Scientists have identified a tipping point for Greenland's ice sheet – and it's just around the corner
Study shows pando, world's largest organism, may have been growing continuously since the first humans left Africa
Seed-scattering cucumbers thicken and become tough to eject seeds with 'astonishing speed and accuracy', study finds
An 'alien plant' fossil found near a Utah ghost town does not belong to any known plant family, living or extinct.