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Archaeology

Stone artifacts hint that humans reached the Americas surprisingly early

Finds uncovered in a Mexican cave suggest North America may have had human inhabitants more than 30,000 years ago — way before archaeologists thought.

Astronomy

This is the first picture of a sunlike star with multiple exoplanets

A first family portrait reveals a weird cousin of the solar system: a star about the mass of the sun orbited — distantly — by two massive gas giants.

Health & Medicine

A blood test may show which COVID-19 patients steroids will help — or harm

An inflammation marker was a good indicator of which patients had lower or higher risks of dying or needing a ventilator when given steroids.