One of the objects involved in this collision was the source of L-chondrites, still the most common type of meteorite, the identity of the ...

Splattered with golden-red lichen, the rocks flaunt eerie contours. One resembles a snarling carnivore, the other a whale’s vertebra (or is...

Heavy metal pollution might have contributed to some of the world's largest extinction events, according to a study of 415-million-year old...