Testing everyone for HIV and then giving them early treatment could theoretically eliminate the epidemic in South Africa. A mathematical model of this "test and treat" strategy suggest that it might be more expensive and take significantly longer than previously predicted.
Scientists have found that the aquatic birds are good indicators of toxins in the environment. That's why researchers have taken to the waters of western Maine for what's believed to be the longest-running loon monitoring study in North America.
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.
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