In the wake of the 439 comments on my last post about obesity and weight-bias in our society, I've been thinking about issues of comparative health around the world and, as I have before, about the Paleo diet.
We've all seen a flock of birds shift direction instantaneously mid-flight, or a school of fish swirl in what looked like tightly choreographed maneuvers. That's called collective behavior and it fascinated and baffled scientists. Why do they do it? How? Telepathy? Now technology is revolutionizing the way researchers can track, visualize and even create swarms, and what they're finding will make you go wow.
A trio of Chinese astronauts has successfully docked with the Tiangong-1 space laboratory for what's expected to be a total of 15 days in orbit — the longest mission to date for China's burgeoning manned space program.
A once-a-day pill has been proven to lower the risk of getting HIV among needle-using drug addicts, just as it does among heterosexual couples and men who have sex with men.
Among 2,400 injecting drug users in Bangkok, those assigned to take a daily dose of an antiviral drug Viread, or tenofovir generically, had half the risk of getting HIV over a four-year period as those who took a placebo pill. Among those who took tenofovir faithfully, there were 74 percent fewer infections.
What is it about dolphins? They have very, very big brains, and that makes we humans, whose brains are nothing to sniff at, nervous. We don't know what to make of them.
The latest example: On May 17 in India, the Ministry of Environment and Forests issued an order to all Indian states banning dolphin amusement parks. No leaping out of pools to catch balls, no jumping through hoops. Forcing dolphins to entertain humans, the ministry said, was morally unacceptable.
Nature documentaries always go on and on about how fast a cheetah can run. Cats in captivity have been clocked at 65 miles an hour, the highest speed recorded for any land animal.
And yet, scientists know very little about how the animal runs in the wild, especially when on the hunt.
"You can look at it and say, 'Oh that's fast,' " says Alan Wilson, a veterinarian at the Royal Veterinary College, London. "But you can't actually describe what route it follows, or how quickly it's gone, or the details of [the] forces it has to exert to do that."
This week marks the 20th anniversary of the classic film, Jurassic Park. Michael Dhar, a science writer and contributor to the website Live Science, tells Melissa Block and Audie Cornish about how the science featured in the movie holds up to what we know about dinosaurs today.
The connected car promises voice-activated systems that let drivers dictate emails and texts, make a dinner reservation or update their Facebook page, all while behind the wheel. Some cars already have these options. Many more are on the way. Carmakers say it's safer than fiddling around with a smartphone.
When a kid lops off a fingertip with a cleaver or car door, there's a chance the end of the digit will grow back. The fingerprint will be gone, and the tip may look a bit strange. But the flesh, bone and nail could return.
Now biologists at New York University have figured out just how this lizard-like regeneration happens in mice. There's some secret sauce at the nail cuticle that makes it possible, scientists report Wednesday in the journal Nature.