Newfoundland

A massive ice island broke off of the Petermann Glacier in Greenland. The iceberg, which contains enough fresh water to supply every American for half a year, is roughly twice the size of Manhattan in New York.

As Canada confronts its need for electricity and a desire to reduce the amount of carbon it pumps into the atmosphere, it’s turning to two, large hydroelectric dams in Labrador. But there’s potential for other environmental damage that has many in the area saying “no thanks.”

New archeological finds have led a Smithsonian Institute researcher to write a book detailing what he believes is the journey of the first Americans, from Europe to North America’s east coast. This contradicts earlier evidence that the first Americans came from Asia.

What you eat ends up in your hair. Scientists in the US and Europe have used this basic idea to devise a sort of hair-based GPS tracking system. Law enforcement agencies are now using this technique to solve crimes. NOVA’s Ari Daniel Shapiro reports.

The Canadian province of Newfoundland and Labrador plans to build two huge new hydroelectric dams on the Churchill river. Backers say the dams will be an important source of low-carbon electricity while opponents warn against it.