Unlike animals, we communicate all kinds of information with our eyes. One subtle glance might express doubt and another joy, all without a word. How did we get this way?

Looking for the clearest amber on Earth? A new study shows that Dominican Republic amber is clear enough to see what's inside. Apparently, ancient parasitic protozoans loved to live inside intact red blood cells.

A 15-year-long project finally bore fruit after researchers painstakingly identified a specific gene mutation that can lead to sudden heart failure in otherwise healthy-looking young people. These newly published results counter the long-standing view that mutations can somehow drive evolutionary innovation.