Britain's wheat harvest could be a third smaller than it was last year due to extreme weather since the autumn, the National Farmers' Union warns.

The "harmful misuse" of mobile phone apps that mimic birdsong can stop birds performing important tasks such as feeding their young, experts say.

Long, thin grooves on the surface of Mars may be made by frozen blocks of "dry ice" that flow down Martian sand dunes, scientists say.

Astronomers point X-ray telescopes at a galaxy's central black hole, last seen snacking on a cloud of gas - but it seems to have fallen dormant.

A study of the movements of cheetahs suggests that their hunting prowess comes not from sheer speed, but from rapid acceleration and deceleration.