Scientists know there are more giant craters in Siberia, but are nervous to even study them

Updated March 4 2015 - 10:23am, first published February 27 2015 - 3:55am

In the middle of last summer came news of a bizarre occurrence no one could explain. Seemingly out of nowhere, a massive crater appeared in one of the planet's most inhospitable lands. Early estimates said the crater, nestled in a land called "the ends of the Earth" where temperatures can sink far below zero, yawned nearly 30 metres in diameter.