Ancient DNA offers clues to the Canaanites’ fate

DNA is setting the record straight on ancient Canaanites. For the first time, scientists have deciphered the complete genetic instruction manuals of Canaanites. By comparing five Canaanite genomes with those of other ancient and modern populations, the researchers identified the Canaanites’ ancestors and discovered their descendants, modern Lebanese people. The results, reported online July 27 […]

Remembering Joe Polchinski, the modest physicist who conceived a multiverse

Modesty is not a quality often found in abundance in physicists. Maybe that’s because Joe Polchinski had all of it. Substantial ego is arguably a necessary qualification for anyone attempting to wrest nature’s deepest secrets from their mathematical lairs. And in many cases, ego seems proportional to the magnitude of a physicist’s accomplishments. But if […]

In a pack hunt, it’s every goatfish for itself

The only fish known to hunt with wolf pack moves may not be true team players, just lemon-yellow me-firsts. Yellow saddle goatfish (Parupeneus cyclostomus) do more than school together as they dart over Indo-Pacific coral reefs. Like wolves, the goatfish take different roles in a pursuit. One or two fish may rush straight toward prey […]