Techniques developed to study the distant past—from dating ancient artifacts to reconstructing climate records in ice ...

Sign up for the Concord Monitor’s morning newsletter for essential news each day, and our contests and promotions list for special offers and giveaways. In cartoons ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. The broad-shelled river ...

By studying the chemical fingerprints inside each layer, scientists have been able to learn about the turtles’ lives and the ...