Sci/Tech

As another major tornado hits the United States - this time killing dozens and flattening buildings and neighbourhoods in Oklahoma City - Channel 4 News looks at the science behind the super storms.

It is young, hip and has more than 100 million users around the world. Now Yahoo! has agreed a $1bn dollar deal to buy Tumblr - will it recapture its long lost cool?

Former British helicopter pilot Major Timothy Peake becomes the UK's first home-grown astronaut after being selected as one of six candidates to join the International Space Station.

A British dad is set for stardom after the paper helmets he used to make for his kids are picked up by Daft Punk as the face of their new album, Random Access Memories.

by Asha Tanna

Thousands of infertile couples could see their chances of having a baby improved following a new technique which assesses the quality of IVF embryos before they are implanted.

by Geoff White

Three LulzSec members are sentenced to between 20 and 32 months for hacking offences. But from the beginning, the Lulzsec group stood in stark contrast to the secretive profiles of other hackers.

New figures show that older women are far less likely to be on television than men, representing fewer than one in five of over-50 TV presenters.

Commander Chris Hadfield touches down in Kazakhstan with two fellow astronauts - Tom Marshburn and Roman Romanenko - after five months on the ISS. Hadfield said: "Boy, that was quite a ride home!"