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Astronomy

Exoplanet spin measured for first time

Astronomers measure the spin of a planet outside our solar system, and its days are short: just over eight hours.

Science & Society

Students retain information better with pens than laptops

Compared with typing on a laptop, writing notes by hand may lead to deeper understanding of lecture material.

Animals

Abandoned frog eggs can hatch early

If their father doesn’t keep them hydrated, frog embryos react by hatching early.

Chemistry

Color-changing polymer maps fingerprints

Tiny beads of sweat may offer new way to identify people’s fingerprints.