Highly trained dogs are part of the U.S. military's fight against improvised explosive devices, which are the No. 1 killer of civilians and troops in Afghanistan. The dogs can search places that high-tech equipment simply can't.
Most animals leave their home turf when they reach adulthood to avoid competing with relatives. But here's an exception. More than three decades of dogged research shows that prairie dogs are more likely to disperse when all their family members are gone.
Forest elephants in central Africa are being slaughtered in record numbers for their ivory tusks, a decade-long study finds. The U.S. government and wildlife advocacy groups are struggling to slow the killings as poaching is overcoming laws and treaties intended to protect the species.
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