Nuclear device

North Korea has `significant` tech to build mini nuclear device: South

South Korea`s defence ministry said Tuesday that North Korea appeared to have achieved a "significant" level of technology to miniaturise a nuclear device to be fitted on the tip of a missile.

Jan 06, 2015, 11:33 AM IST

Technologies being developed to save Earth from asteroids

Lowa State University engineers are developing ideas and technologies to save the Earth from potentially hazardous asteroids.

Mar 08, 2013, 11:31 AM IST