Like chimpanzees, dolphins are large-brained and highly social animals, but can they recognize themselves in a mirror? Psychologist and dolphin researcher Diana Reiss discusses her work with dolphin communication and cognition.
To feed, the hawk moth unrolls a long proboscis, sticks it in a flower like a straw, and slurps up nectar. It looks like a hummingbird feeding. Like the hummingbird, the moth has to be stable in the air to get a drink. Biologist Ty Hedrick filmed the moths with high-speed video to try to understand how they hold steady.
There are now 7 billion people, according to the U.N.'s population division. That prompts a question: Who else is in the 7 Billion Club? To learn which other animals had reached that plateau, we asked wildlife experts — who said it's a tough call.
Lots of creepy crawly things will appear on doorsteps and fence posts for Halloween, but will they be on your dinner plate? Insects are being proposed as a cheap and environmentally friendly food source. Long accepted around the world, eating bugs is considered, well, gross to many in North America and Europe.
San Francisco has a burgeoning entomophagy (bug eating) movement, and its proponents say bugs have a lot of advantages over meat. They're tasty, not that different from shellfish, and better for the environment.
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