Meteorites: Best Places to See Them Up Close

The meteorite that touched down in central Russia on Friday sent many people running, hoping to avoid getting hurt. Now, plenty of others will be running in search of valuable meteorite pieces, which can be filled with precious metals.

Although it can be cost prohibitive to collect them, museums and other tourist sites offer an inexpensive way to admire space rocks. (Related: Asteroid Impacts: 10 Biggest Known Hits)

Here are five noteworthy meteorites from around the globe.

1. Hoba Meteorite

Where is it: Right where it landed, in Namibia, South Africa. It was declared a National Monument in 1955.

Specs: This is the largest single meteorite ever found and the largest slab of naturally-occurring iron ever discovered on Earth's surface. The Hoba Meteorite weighs 60 tons and measures roughly nine feet wide by nine feet long, with a depth of three feet.

Origin: The Hoba is thought to have fallen through Earth's atmosphere 80,000 years ago, but it wasn't discovered until a farmer came across it in 1920. Despite its size, the meteorite left no impact crater, which scientists are still trying to explain. Many believe that the combination of its shape and the Earth's atmosphere must have significantly decreased the speed at which it was traveling before it crash-landed.

2. El Chaco Meteorite

Where is it: After an attempt to move the rock to Germany was blocked in 2012 by Argentine citizens and scientists, El Chaco and the rest of the pieces sit comfortably in the El Chaco province in northeastern Argentina.

Specs: The El Chaco Meteorite is one of many fragments of a group of iron meteorites called Campo del Cielo. Weighing over 37 tons, it is not only the largest fragment of that group but also the second-largest single-piece meteorite. The combined weight of the fragments discovered far exceeds 60 tons, which would have allowed it to steal the Hoba's mantle of largest meteorite found on Earth.

Origin: The meteorite was believed to have landed in the northeastern part of Argentina as part of a meteor shower sometime between 4,000 and 5,000 years ago.

3. Willamette Meteorite

Where is it now: The American Natural History Museum in New York

Specs: Weighing 15.5 tons, the iron Willamette Meteorite is the largest ever found in the United States. It is also the sixth-largest in the world.

Origin: Although discovered in Oregon in 1902 by a miner named Ellis Hughes, the pitted meteorite is believed to have crashed into Earth at least a million years ago, the result of an iron-nickel core of a planet or moon shattering in a stellar collision. It is revered by an American Indian tribe known as the Clackamas Chinook, who lived in Willamette Valley prior to European settlement.

4. Ahnighito, also known as the Tent

Where is it: The American Natural History Museum in New York

Specs: Ahnighito weighs in at 31 tons and is the largest meteorite ever moved by man.

Origin: The meteorite is one fragment of the massive Cape York Meteorite that was thought to hit Earth over 10,000 years ago in an area that is now northwestern Greenland.  Once belonging to the native Inuit tribe, the chunk of iron was coveted by many different people. It wasn't until 1897 when explorer Sir John Ross risked everything to take the Tent to New York. He had to manually slide the rock onto his ship, making it the ultimate battle of man vs. nature—with man coming out on top.

5. Bacubirito Meteorite

Where is it: It is currently on display at the Centro de Ciencias building in Culiacan, a city in northwestern Mexico.

Specs: The Bacubirito Meteorite weighs 24 tons—much smaller than the ones described above—but measuring 14 feet across, it is one of the longest meteorites ever found.

Origin: The meteorite was discovered in 1863 by geologist Gilbert Ellis Bailey and is considered one of Mexico's most famous tourist attractions.

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Carnival Cruise Ship Hit With First Lawsuit

The first lawsuit against Carnival Cruise Lines has been filed and it is expected to be the beginning of a wave of lawsuits against the ship's owners.

Cassie Terry, 25, of Brazoria County, Texas, filed a lawsuit today in Miami federal court, calling the disabled Triumph cruise ship "a floating hell."

"Plaintiff was forced to endure unbearable and horrendous odors on the filthy and disabled vessel, and wade through human feces in order to reach food lines where the wait was counted in hours, only to receive rations of spoiled food," according to the lawsuit, obtained by ABCNews.com. "Plaintiff was forced to subsist for days in a floating toilet, a floating Petri dish, a floating hell."

Click Here for Photos of the Stranded Ship at Sea

The filing also said that during the "horrifying and excruciating tow back to the United States," the ship tilted several times "causing human waste to spill out of non-functioning toilets, flood across the vessel's floors and halls, and drip down the vessel's walls."

Terry's attorney Brent Allison told ABCNews.com that Terry knew she wanted to sue before she even got off the boat. When she was able to reach her husband, she told her husband and he contacted the attorneys.

Allison said Terry is thankful to be home with her husband, but is not feeling well and is going to a doctor.

Carnival's Triumph Passengers: 'We Were Homeless' Watch Video

Girl Disembarks Cruise Ship, Kisses the Ground Watch Video

Carnival Cruise Ship Passengers Line Up for Food Watch Video

"She's nauseated and actually has a fever," Allison said.

Terry is suing for breach of maritime contract, negligence, negligent misrepresentation and fraud as a result of the "unseaworthy, unsafe, unsanitary, and generally despicable conditions" on the crippled cruise ship.

"Plaintiff feared for her life and safety, under constant threat of contracting serious illness by the raw sewage filling the vessel, and suffering actual or some bodily injury," the lawsuit says.

Despite having their feet back on solid ground and making their way home, many passengers from the cruise ship are still fuming over their five days of squalor on the stricken ship and the cruise ship company is likely to be hit with a wave of lawsuits.

"I think people are going to file suits and rightly so," maritime trial attorney John Hickey told ABCNews.com. "I think, frankly, that the conduct of Carnival has been outrageous from the get-go."

Hickey, a Miami-based attorney, said his firm has already received "quite a few" inquiries from passengers who just got off the ship early this morning.

"What you have here is a) negligence on the part of Carnival and b) you have them, the passengers, being exposed to the risk of actual physical injury," Hickey said.

The attorney said that whether passengers can recover monetary compensation will depend on maritime law and the 15-pages of legal "gobbledygook," as Hickey described it, that passengers signed before boarding, but "nobody really agrees to."

One of the ticket conditions is that class action lawsuits are not allowed, but Hickey said there is a possibility that could be voided when all the conditions of the situation are taken into account.

One of the passengers already thinking about legal action is Tammy Hilley, a mother of two, who was on a girl's getaway with her two friends when a fire in the ship's engine room disabled the vessel's propulsion system and knocked out most of its power.

"I think that's a direction that our families will talk about, consider and see what's right for us," Hilley told "Good Morning America" when asked if she would be seeking legal action.

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Sand-grain-sized drum extends reach of quantum theory

The banging of a tiny drum heralds the intrusion of the weird world of quantum mechanics into our everyday experience. Though no bigger than a grain of sand, the drum is the largest object ever to have been caught obeying the uncertainty principle, a central idea in quantum theory.

As well as extending the observed reach of quantum theory, the finding could complicate the hunt for elusive gravitational waves : it suggests that the infinitesimal motion caused by these still-hypothetical ripples in spacetime could be overwhelmed by quantum effects.

The uncertainty principle says that you cannot simultaneously determine both a particle's exact position and momentum. For example, bouncing a photon off an electron will tell you where it is, but it will also change the electron's motion, creating fresh uncertainty in its speed.

This idea limits our ability to measure the properties of very small objects, such as electrons and atoms. The principle should also apply to everyday, macroscopic objects, but this has not been tested – for larger objects, the principle's effects tend to be swamped by other uncertainties in measurement, due to random noise, say.

Quantum drum

To extend the known reach of the uncertainty principle, Tom Purdy and colleagues of the University of Colorado, Boulder, created a drum by tightly stretching a 40-nanometre-thick sheet of silicon nitride over a square frame with sides of half a millimetre – about the width of a grain of sand. They placed the drum inside a vacuum chamber cooled to a few degrees above absolute zero, minimising any interference by random noise.

By continuously firing a stream of photons at the drum they were able to get increasingly precise measurements of the position of the skin at any moment. However, this also caused the skin to vibrate at an unknown speed. When they attempted to determine its momentum, the error in their measurement had increased – just as the uncertainty principle predicts.

"You don't usually have to think about quantum mechanics for objects you can hold in your hand," says Purdy.

That the uncertainty principle holds sway at such a large scale could affect the hunt for gravitational waves, which are predicted by Einstein's theory of general relativity but have never been detected.

Mitigation strategy

Gravitational wave detectors look for very slight changes in the distance between two test masses caused by passing spacetime ripples. Purdy says his team's experiment confirms long-held suspicions that quantum uncertainty could overwhelm these very small changes.

Now he and others can use the drum to explore more advanced measurement techniques to mitigate the effects. For example, uncertainty in an object's momentum could lead to future uncertainty in its position and there should be ways to minimise such knock-on effects. "You can't avoid the uncertainty principle, but you can in some clever ways make it [such that] increasing the momentum doesn't add back to the uncertainty in position at a later time," says Purdy.

His experiment is a neat demonstration of the breakdown of the traditional notion that the atomic world is quantum while the macroscopic world is classic, says Gerard Milburn of the University of Queensland in Brisbane, Australia, who was not involved in the work. Previous, attempts to blur the quantum-classical divide have involved entangling diamonds and demonstrating quantum superposition in a strip of metal.

Despite these feats, Milburn doesn't rule out the prospect of a breakdown on really large scales. "Of course maybe one day we will see quantum mechanics fail at some scale. Testing it to destruction is a good motivation for going down this path," he says.

Journal reference: Science, DOI: 10.1126/science.1231282

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Capriles says Venezuela lying about Chavez health

CARACAS: Venezuelan opposition leader Henrique Capriles on Thursday again accused the government of lying about the health of cancer-stricken President Hugo Chavez, who is convalescing in Cuba.

"Most probably, they have lied to us about the condition of the president of the republic during the past two months," Capriles told a press conference.

He said authorities in Caracas had already "lied" to the people by saying the national currency would not be devalued -- only to announce the devaluation of the bolivar by more than 30 per cent, which went into effect Wednesday.

"If a person can sign documents, then why can't that person speak to the nation? Therefore, they are lying -- the president is not really speaking or signing anything," Capriles said.

Chavez, 58, has not been seen or heard from since his last cancer operation on December 11 in Havana.

Vice President Nicolas Maduro said Wednesday that the firebrand leftist leader was undergoing "extremely tough and complex" treatment in the Cuban capital.

Declining to provide details about the course of treatment, Maduro insisted that Chavez was facing his medical travails with a "fighting spirit."

Capriles, who lost to Chavez in October's presidential election, however said the president could be in a condition that is "totally different" from what government ministers have described.

The governor of Miranda state refused to say whether he would again run for the presidency should a special election be called if Chavez -- who has been in power since 1999 -- is unable to carry on.

Chavez was too sick to attend his own inauguration on January 10, prompting the government to delay the swearing-in indefinitely under an interpretation of the constitution that was heavily criticized by the opposition.

Throughout his illness, first detected in June 2011, Chavez has refused to relinquish the powers of the presidency.

- AFP/jc

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PS4 prototype controller revealed?

Sony will reveal the future of the PlayStation brand at a New York City event next Wednesday, but one of the company's surprises may have just leaked. Destructoid has obtained an image of what is rumored to be the
PlayStation 4's new touch screen-equipped controller.

A "trusted source" has confirmed to IGN that the leaked PlayStation 4 controller image is indeed real, but is only a prototype. The final design could change. An industry source confirmed the same to gaming blog Kotaku.

The image matches up with previous reports, which suggested the PS4 controller would be similar in shape to the DualShock and include a front-facing touch screen. The rumored controller also does not have Start, Select, or Share buttons on its face, matching up with a past report that these buttons had been shifted or removed.

The controller in question also features some sort of illuminated light on its top as well as audio output functionality, similar to the
Wii. The pad is plugged into what looks like a development kit, though this is unclear.

Read more of "PS4 prototype controller revealed?" at GameSpot.

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Why We Walk … and Run … And Walk Again to Get Where We're Going

You have to get to a bus stop to catch the once-an-hour express ... or to a restaurant to meet a friend ... or to a doctor's office. You've got maybe a half a mile to cover and you're worried you'll be late. You run, then you stop and walk, then run some more.

But wait. Wouldn't it be better to run the whole way?

Not necessarily.

A new study by an assistant professor of mechanical engineering at Ohio State University tests the theory that people subconsciously mix walking and running so they get where they need to. The idea is that "people move in a manner that minimizes energy consumption," said the professor, Manoj Srinivasan.

Srinivasan asked 36 subjects to cover 400 feet (122 meters), a bit more than the length of a football field. He gave them a time to arrive at the finish line and a stopwatch. If the deadline was supertight, they ran. If they had two minutes, they walked. And if the deadline was neither too short nor too far off, they toggled between walking and running.

The takeaway: Humans successfully make the walk-run adjustment as they go along, based on their sense of how far they have to go. "It's not like they decide beforehand," Srinivasan said. (Get tips, gear recommendations, and more in our Running Guide.)

The Best Technique for "the Twilight Zone"

"The mixture of walking and running is good when you have an intermediate amount of time," he explained. "I like to call it 'the Twilight Zone,' where you have neither infinite time nor do you have to be there now."

That ability to shift modes served ancient humans well. "It's basically an evolutionary argument," Srinivasan said. A prehistoric human seeking food would want to move in a way that conserves some energy so that if food is hard to find, the hunter won't run out of gas—and will still be able to rev it up to escape predators.

The study, published on January 30 in the Journal of the Royal Society Interface, doesn't answer that question of how we make such adjustments.

Runners: Take a Break if You Need It

The mix of walking and running is also something that nonelite marathoners are familiar with. Covering 26.2 miles might take less of a toll if the runner stops running from time to time, walks a bit, then resumes a jogging pace. "You use less energy overall and also give yourself a bit of a break," Srinivasan noted. (Watch: An elite marathoner on her passion for running.)

One take-home lesson is: Runners, don't push it all the time. A walk-run mix will minimize the energy you expend.

Lesson two: If you're a parent walking with your kid, and the kid lags behind, then runs to catch up, then lags again, the child isn't necessarily trying to annoy you. Rather, the child is perhaps exhibiting an innate ability to do the walk-run transition.

Potential lesson three: The knowledge that humans naturally move in a manner that minimizes energy consumption might be helpful in designing artificial limbs that feel more natural and will help the user reduce energy consumption.

The big question for Manoj Srinivasan: Now that he has his walk-run theory, does he consciously switch between running and walking when he's trying to get somewhere? "I must admit, no," he said. "When I want to get somewhere, I just let the body do its thing." But if he's in a rush, he'll make a mad dash.

"Talk to you tomorrow," he signed off in an email to National Geographic News. "Running to get to teaching now!"

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Ship Overcomes Towing Issues, Inches Closer to Port

The agonizingly slow progress of the stricken Carnival Triumph cruise ship carrying 4,000 passengers and crew was further delayed today by problems with the tug boats towing it in, meaning exhausted passengers may not get off the ship until nearly dawn.

The ship is now expected in port between 9:30 p.m. and 12:30 a.m. CT, according to Carnival. It could take up to five more hours to get everybody off the huge ship.

"There are some limitations. We know that up front," Carnival Cruise Senior Vice President of Marketing Terry Thornton said at a news conference this afternoon. "The ship still does not have power. We only have one functioning elevator aboard."

Thornton said that anyone with special needs and children will be the first to get off the boat. He said the company's number one priority is to make the process as "quick, efficient and comfortable" for guests as possible.

"We're not anticipating any additional difficulties," he said.

Click here for photos of the stranded ship at sea.

The passengers were achingly close to port about noon today as the ship began to enter the channel and proceed to the cruise terminal. At 1 p.m., the lead tow boat had a tow gear break, so a spare tug boat that was on standby had to be sent in to replace it.

But once the second tug was in position and the lines were re-set, the towing resumed only briefly before the tow line snapped.

"We had to replace that tow line so the ship did not begin progressing back into the cruise terminal until 2 p.m.," Thornton said

Stranded Carnival Cruise Ship On Its Way to Port Watch Video

Carnival Cancels All Scheduled Voyages Aboard the Triumph Watch Video

Carnival Cruise Ship Making Its Way to Port Watch Video

Passengers desperate to get off the vessel waved at media helicopters that flew out to film the ship and passenger Rob Mowlam told ABCNews.com by phone today that most of the passengers on board were "really upbeat and positive."

Nevertheless, when he gets off Mowlam said, "I will probably flush the toilet 10 times just because I can."

Mowlam, 37, got married on board the Triumph Friday and said he and his wife, Stephanie Stevenson, 27, haven't yet thought of redoing the honeymoon other than to say, "It won't be a cruise."

Alabama State Port Authority Director Jimmy Lyons said that with powerless "dead ships" like the Triumph, it is usually safer to bring them in during daylight hours, but, "Once they make the initial effort to come into the channel, there's no turning back."

"There are issues regarding coming into the ship channel and docking at night because the ship has no power and there's safety issues there," Richard Tillman of the Mobile Bay Convention and Visitors Bureau told ABCNews.com.

When asked if the ship could be disembarked in the dark of night, Tillman said, "It is not advised. It would be very unusual."

Thornton denied the rumors that there was a fatality on the ship. He said that there was one illness early on, a dialysis patient, but that passenger was removed from the vessel and transferred to a medical facility.

The U.S. Coast Guard is assisting now and there are multiple generators on board. And customs officials will board the ship while it is being piloted to port to accelerate the embarkation, officials said.

After eight miserable days at sea, the ship's owners have increased the compensation for what some on board are calling the vacation from hell.

All 3,143 passengers aboard the 900 foot colossus, which stalled in the Gulf of Mexico after an engine room fire early Sunday, were already being given a full refund for the cruise, transportation expenses and vouchers for a another cruise. Carnival Cruise Lines is now boosting that offer to include another $500 per person. Gerry Cahill, president and CEO of Carnival Cruise Lines, announced the additional compensation Wednesday.

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Water wars loom as the US runs dry

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Tennis: Nadal out of Brazil Open doubles over knee fear

SAO PAULO: Rafael Nadal will not play his scheduled doubles match at the Brazil Open Wednesday because of "knee overuse", organisers said.

But they added that the Spanish star intends to play his opening singles match Thursday against Brazilian Joao Souza.

World number five Nadal had been scheduled to team up with Argentina's David Nalbandian in a second-round encounter against Argentine Horacio Zeballos and Austrian Oliver Marach on Wednesday.

Former world number one Nadal only returned to the tour in Chile last week, where he lost in the final, after a seven-month injury absence.

"The conditions are very difficult. The court is not in the best condition and the ball is very difficult to control," Nalbandian told a press conference.

Nalbandian and Nadal won a hard-fought match 6-3, 3-6, 11-9 against Spaniards Pablo Andujar and Guillermo Garcia-Lopez on the court late Tuesday.

"It's too bad I cannot play the doubles after the match Rafa and I had (yesterday)," the Argentine said. "But he (Nadal) has to take care of himself and prepare for a long and hard year".

At a press conference Tuesday, Nadal complained about having to play so many hardcourt events

"That is a theme among the players and doctors," he said.

While conceding that reducing the number of events on hard surface was not possible at this time, he added: "I think that the ATP has to work to think of how to lengthen tennis players' careers."

"Can you imagine football players playing on cement?" he added.

"I am a bit tired after a hard week in Chile. But it was positive. The process of recovery follows its course," Nadal also said. "As always I come here to do the best possible and hope that things turn out all right."

Asked when he expected to be 100 per cent fit, he responded: "I cannot know the future. If my knee allows, I will do everything possible to be at my best."

"I am a player who plays with a lot passion, a lot of energy. I suppose that does not help the knee."

"My long-term objective is to be in Brazil in 2016 (for the Rio Summer Olympics). I am going to work to arrive in good condition at what are likely to be my last Olympics," he said.

Considered by many to be the best ever claycourt player, seven-time French Open champion Nadal was back in Chile last week for the first time since a surprise second-round exit at Wimbledon in June.

The world number five lost the singles and doubles finals in the Vina del Mar Open on Sunday.

- AFP/jc

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Commodore 65 prototype sells for $7,625

Did you adore your 64? Well, wanna buy a 65? That'll cost you.

Earlier this month we saw how fans of vintage home computers can get a little crazy on eBay, bidding up the price of a 1983 10MHz Texas Instruments TI-99/8 to $3,240.

Well that's nothing compared with the enthusiasm that Commodore commands. A prototype Commodore 65 more than doubled the winning TI bid when it sold on eBay recently for a whopping $7,625.

Described as by the seller as "the proposed successor to the most popular computer of all time," the C65 is a prototype engineering unit that's missing some chips. It doesn't even work, but it came with a prototype Mitsumi keyboard.

Regardless, bidders sure wanted to get their hands on it.

Developed around 1991, the 3.54MHz Commodore 65 was designed to build on the C64's success and, like the Commodore 128, be generally compatible with its software.

The 8-bit C65 had improved graphics, a built-in 3.5-inch floppy drive, up to 8MB of RAM, and 128K ROM. It ran Commodore BASIC 10.0.

Unfortunately the C65 project was cancelled before it got to market, and Commodore declared bankruptcy in 1994.

However, some C65s were made as engineering prototypes and survived the company's liquidation. The number of extant units is unknown; estimates range from dozens to hundreds.

The machine's MRSP was only $300-$350, according to this C65 page.

"A working 65 is the Holy Grail of the Commodore 8-bit world these days," the site says.

Until the Grail turns up, I'll just keep watching C64 ads.

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