Science journalist Emily Anthes talks about how scientists are engineering mice with tumors and working to create pigs that can grow organs for human transplant and insects that could serve as drones for the military.
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.
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