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Why lists of worldwide bird species disagree

How many species of birds are there in the world? It depends on whose count you go by. The number could be as low as 10,000 or as high as 18,000. It's tough to standardize lists of species because the concept of a "species" ...

Filter paper can reveal species under the sea

A new study from Australia's national science agency, CSIRO, in waters off the Western Australian coast has showed floating a special kind of filter paper in seawater can reveal which species are present in an area.

Why do mass shootings spawn conspiracy theories?

While conspiracy theories are not limited to any topic, there is one type of event that seems particularly likely to spark them: mass shootings, typically defined as attacks in which a shooter kills at least four other people.

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