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Earlier this year, a three-year-old video of researchers extracting a long, twisted tube from a reptile’s bleeding nostril went viral. To date, it has accumulated more than 30 million views and set off a moral panic.

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

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?