How many ants are on Earth? 20 quadrillion, study says

There are at least 20 quadrillion ants on Earth, according to a new study that says even that staggering figure likely underestimates the total population of the insects, which are an essential part of ecosystems around the ...

Captive-bred salmon in wild may do more harm than good

Releasing captive-bred Atlantic salmon into the ocean, a long-standing practice to boost stocks for commercial fishing, reduces the rate at which wild populations reproduce and may ultimately do more harm than good, researchers ...

Why India's plan to reintroduce cheetahs may run into problems

A nature reserve in India could soon be the only location in the world to host wild populations of four major big cat species—tiger, lion, leopard and cheetah. Kuno-Palpur, in central state of Madhya Pradesh, may not be ...

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