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Ullas Karanth, a senior scientist with the Wildlife Conservation Society, is one of the world’s premier tiger experts and a leader in the effort to restore India’s depleted tiger populations. Raised in the South India state of Karnataka, he has spent much of his professional life studying and working to bring back tigers there, starting in Nagarahole National Park in the foothills of the Western Ghats, and then across a 10,000-square-mile region of that mountain range.

A global biodiversity collapse is imminent unless we take urgent, concerted action to reverse species loss in the tropics, according to a major scientific study in the prestigious journal Nature.  

Plants have to defend themselves against drought, enemies and disease. But different threats demand different responses. So how do plants know what’s attacking them?

Scientists at Scripps Research have uncovered a new strategy to kill tumors, including some triple-negative breast cancers, without harming healthy cells, a discovery that could lead to more ways to treat tumors while reducing side effects.

Tropical Storm Jongdari appeared much more organized in visible imagery from NASA’s Terra satellite when passed over the Northwestern Pacific Ocean.