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The psychoactive drug known as ecstasy can make people feel extra loving toward others, and a study published Thursday suggests it has the same effect on octopuses.

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Conservationists have developed a new high-tech strategy to trace the cartels that smuggle much of the illegal ivory around the world — by using DNA to track ivory back to specific ports.

Biologist Samuel Wasser from the University of Washington is behind the effort. He notes that while poaching in Africa has dipped recently, too many elephants are still dying.

"Right now we're estimating that there are about 40,000 elephants being killed every year," he says, "and there are only 400,000 left in Africa. So that's a tenth of the population a year."

North Korea announced today that it will permanently close a major missile test site. Kim Jong Un, the North's leader, said the site would be dismantled in the presence of international inspectors.

When patients come to Dr. Molly Quinn for infertility treatments, they usually aren't too interested in hearing about the possible downsides, she says. They just want to get pregnant.

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