Millions of years ago, a herd of dinosaurs left behind footprints in what has been interpreted as a stampede to escape a predator. A young researcher now suggests a very different interpretation. Ari Daniel Shapiro of our partner program NOVA reports.
Scientists from the United States and Australia are teaming up to try and help save disappearing coral reefs, by freezing coral eggs and sperm, so that endangered species aren't lost. The coral can be grown in the lab, and then implanted on the reefs.
Australia has thousands of refugees clamoring for asylum every year. In a bid to get a handle on the problem, the country has decided to setup refugee processing centers on small, Pacific islands where the refugees will remain until a decision is made on their status.
At some level, all countries push new citizens to integrate and that's where civics and language citizenship tests come in. But when you take a longer look at how citizenship exams are developed worldwide, you realize they can have less to do with methodology than promoting a strict cultural identity.