Why Yellow Birds Mysteriously Turn Red

National Geographic News

No one could figure out why a North American woodpecker's feathers were changing color--until now. A northern yellow-shafted flicker with normal coloration flies out of its nesting hole. For the yellow-shafted northern flicker, "you are what you eat" has proven freakishly true. These eastern North American woodpeckers get their name from a thin vein of yellow that runs through the center of their dark feathers. In the past few decades, ornithologists have noticed some the birds' yellow feathers have mysteriously turned red.

Steve Ramirez: If We Could Erase Memories ... Should We?

NPR Technology

Neuroscientist Steve Ramirez used lasers to enter the brains of mice and edit their memories. He imagines a future where this technology might be possible in humans as well. Steve Ramirez is an assistant professor of neuroscience at Boston University. His work focuses on finding where single memories are located throughout the brain, genetically tricking the brain cells that house these memories to respond to brief pulses of light, and then using these same flickers of light to reactivate, erase, and implant memories.

Katie Ledecky won 4 gold medals but can't have a free waffle maker


Katie Ledecky won four gold medals and set two world records at the Olympics this summer. But on Wednesday, she had to concede what some 19-year-olds would consider an even more valuable prize -- a free waffle maker. In her appearance on The Ellen DeGeneres Show, Ledecky faced off against American Ninja Warrior's Grant McCartney in a game of "Foot Flickers." DeGeneres let both contestants know they'd be competing for a waffle maker. SEE ALSO: Make money or go to Stanford?

Top new gear for hunters

FOX News

There are many new small stars that will make big impacts in 2017. From blades with "balls of steel" through to Viking knives, here are eight exciting new items available to hunters this year. For everyday carry and the hunter on the go, Gerber has just launched a knife with Balls of Stainless Steel tech-- or BOSS tech. The "balls of steel" help give the knife a smoother deployment with far less friction. The ball bearings are housed in a round cage inside the knife's handle and the knife has a three-inch blade with a glass filled nylon handle.

This 90-pound 'blind' robot dog definitely won't kill everything you hold dear


It's not like it matters. The MIT Cheetah 3 robot doesn't need sun to hunt you down and dance on your soon-to-be lifeless corpse. You recall when you first read about the "full-grown Labrador" sized robot. It was a Thursday in July, and you somehow happened across press release from EurekAlert. Instead, according to the MIT researchers who developed it, it used "tactile information" to move around.