It's not unheard of in the animal kingdom for males to bear the brunt of early child rearing. But in one species of snail found off the coast of Baja California, many of the eggs the males lug around on their shells aren't even their own offspring.
One of the twin space probes launched 35 years ago has traveled more than 11 billion miles from Earth. The Voyager probes were originally slated just to examine Jupiter and Saturn during a five-year trip.
A vaginal ring that releases a drug against HIV shows promise in an animal study as a way to prevent infections. The results bolster hopes that an ongoing clinical trial of a similar ring in people will prove to be successful.
For decades, scientists thought that most of our genetic code was essentially useless filler between our genes. But the results of a massive project to understand this so-called junk DNA reveal that it contains switches that control how genes function.
Astronauts aboard the International Space Station took a spare toothbrush along on a spacewalk today and used it to help clean debris from around some bolts. What do you use them for? (Besides brushing your teeth, that is.)
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