内容摘要：Bloodhounds are so precise that they can differentiate the smells of identical twins, said Stephanie White, who coordinates training seminars that draw dogs and handlers from around the U.S. to the Florida Public Safety Institute at Tallahassee State College. The dogs are faced with a variety of training scenarios, from wooded areas to pavement to water crossings, she said.

Bloodhounds are so precise that they can differentiate the smells of identical twins, said Stephanie White, who coordinates training seminars that draw dogs and handlers from around the U.S. to the Florida Public Safety Institute at Tallahassee State College. The dogs are faced with a variety of training scenarios, from wooded areas to pavement to water crossings, she said.

Certain clownfish breeding pairs also synced their shrink to boost their survival odds. The females adjusted their size to stay bigger than their partners, keeping the female-dominated social hierarchy intact, researchers said.Other animals also decrease in size to beat the heat. Marine

get smaller during El Niño events that usher warm waters into the Galapagos. But this coping strategy hadn’t yet been spotted in coral reef fish until now.“This is another tool in the toolbox that fish are going to use to deal with a changing world,” said Simon Thorrold, an ocean ecologist at Woods Hole Oceanographic Institution who was not involved with the new study.The tactic helps clownfish weather heat waves in the short-term, but it’s not yet clear how the fish will fare if they have to keep it up in the years to come, Thorrold said.

This photo provided by Morgan Bennett-Smith shows two clownfish swimming near an anemone in Kimbe Bay, off the coast of Papa New Guinea. (Morgan Bennett-Smith via AP)This photo provided by Morgan Bennett-Smith shows two clownfish swimming near an anemone in Kimbe Bay, off the coast of Papa New Guinea. (Morgan Bennett-Smith via AP)

Researchers found the shrinking was temporary. Clownfish possessed the ability to “catch up” and grow back when their environment got less stressful, showing how living things are staying flexible to keep up with a warming world, said study author Melissa Versteeg with Newcastle University.

“These natural systems really are under stress, but there’s a capacity for incredible resilience,” Versteeg said.Charles Mangwiro in Maputo, Mozambique, contributed to this story.

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for working with philanthropies, a list of supporters and funded coverage areas atMATHARE, Kenya (AP) — Joseph Kariaga and his friends once lived the “gangster life” in Nairobi’s Mathare slum, snatching phones, mugging people and battling police. But when Kariaga’s brother was shot dead by police, the young men took stock.