Rocks are books for geologists and right now we’re missing the book (on the Hadean). The Nuvvuagittuq Greenstone Belt would be at least one page of that book, so that’s why it’s so important,” said ...

Beneath the bogs of New Zealand’s Northland is a massive Ngāwhā kauri, living from 41,000 to 42,500 years ago, which gives an isolated, unbroken record of a period when Earth’s magnetic field declined ...