Conservationists challenge football's governing body Fifa to do more to protect the armadillo that inspired this summer's World Cup mascot.

A solar-powered plane that will be taken on a round-the-world journey in 2015 is set to make its inaugural flight on Monday.

US President Obama is to unveil new rules for coal-burning power plants aimed at dramatically cutting emissions that contribute to global warming.

Smoking and the breast cancer risk gene BRCA2 combine to "enormously" increase the risk of lung cancer, a UK-based study shows.

Manufacturers of products that use "conflict minerals" must submit a plan to deal with the problem by Monday, and many are expected to miss the deadline.

There is a new class of planet out there that astronomers are calling the "mega-Earth".

Engineers build sperm-like robot with a metal-coated head, then drive and steer it using magnets.

The operator of Japan's crippled Fukushima nuclear plant starts building a large underground ice wall to isolate toxic water produced by the plant.