Big Ideas: More than a billion animals threatened by Australia’s fires

More than a billion animals, birds and some of the rarest species on Earth are caught in the devastating wildfires in Australia and are on the brink of extinction. Plus, NASA's TESS discovers a new Earth-like exoplanet that could be habitable. And, a study identifies genetic variants linked to anxiety.

Big Ideas: More than a billion animals threatened by Australia’s fires

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