Greenhouse gases NOT to blame for prehistoric climate change, study of ice samples reveals
Previous research suggested carbon dioxide and methane helped drive plummeting temperatures around three million years ago
Chinese probe discovers mysterious huge 'cavity' lurking between Earth and the Moon
The discovery could prove vital for keeping astronauts safe in future lunar missions
‘Learn your lesson!’ Researchers uncover 2,000-year-old bullet inscribed with ominous message
Other ammunition found nearby bore phrases such as 'catch' and 'take a taste'
