Best videos of 2012: Rare view of Challenger tragedy
Watch a rare amateur video of the Challenger explosion, our most-viewed video of the year
Strong jet stream super-charged US Christmas storms
Record snowfall and dozens of tornadoes snarled holiday travel as a powerful winter storm plowed across much of the US, while rainstorms battered the UK
2012 review: The year in life science
The year's biggest stories in life science, including James Cameron's descent into the Mariana trench and efforts to break into Antarctica's buried lakes
Superstorm lessons for adapting to climate change
As the post-Sandy rebuild gets under way, coastal cities around the world will be watching
Best videos of 2012: First MRI movie of childbirth
Watch a unique view of a baby's birth, at number 2 in our countdown of the year's top science videos
Fleadom or death: Reviving the glorious flea circus
The parasite-based sideshows were almost done for by the domestic vacuum cleaner - but they are bouncing back, finds Graham Lawton
Approval for gene-modified salmon spawns controversy
Apparently months late, US regulators have declared genetically engineered fish safe to farm and eat, but final approval could be some way off
Best videos of 2012: New aircraft flies inside out
Watch a novel flying machine use a unique mechanism to propel itself, at number 3 in our countdown of the top videos of the year
2012 review: The year in technology
The year's biggest stories in technology, including Kinect devices that may spot signs of autism and controlling a robot by the power of thought
Superdoodles: The science of scribbling
Far from being a distraction, doodling has an important purpose - and you can harness it
2013 Smart Guide: Wave goodbye to the mouse
The Leap, a 3D motion control device set to launch next year, will let you control your computer with touch-free hand and finger movements