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Astronomy

A newly discovered planet renews debate about how some giant worlds form

An implosion of gas may have given birth to this young exoplanet, which orbits too far from its star to have been built up bit by bit, researchers say.

Archaeology

This hieroglyph is the oldest known record of the Maya calendar

Plaster fragments with the markings date to at least 200 B.C. and indicate that the calendar system, still used today, might be centuries older.

Planetary Science

This is the biggest known comet in our solar system

The nucleus of comet Bernardinelli-Bernstein is about 120 kilometers across — about twice the width of Rhode Island — and is darker than coal.