This is the clearest evidence that our ancestors speared and killed the extinct giant.
Giant sinkhole threatens more homes as it widens each week.
Massive Siberian source of diamonds formed by an asteroid 35 million years ago can 'overturn entire world gem market'.
Reindeer herders find more craters in the far north in a deepening puzzle for scientists.
Does a spooky event in New England 238 years ago hold the clue to the eerie blackness that descended one week ago in Siberia?
Pipes are built over bulging and unstable Arctic pingos prone to violent eruptions caused by 'thawing methane gas', as seen twice on the Yamal peninsula this year.