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Animals

At last, a bird that nails killer chicks

For the first time, researchers have found a bird species—Australia's superb fairy-wren—that reacts when all its own chicks disappear and a giant imposter takes their place.

Earth

Dust up north

Strong northeasterly winds blowing across coastal regions of southern Alaska recently exposed by melting snow launched massive clouds of dust over the Gulf of Alaska.

Astronomy

By the light of a starry eruption

Astronomers calculating the brightness of a supernova explosion witnessed in the 11th century estimate that it was likely the most brilliant stellar event in recorded history.

Health & Medicine

Protein protects rat brains from strokes

Neuroglobin, a protein related to hemoglobin, may protect the brain during strokes.