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Tiago Campante/Peter Devine

Ars Technica - Kepler discovered a system of 11-billion-year-old planets

Five of them, all smaller than Earth, indicate planet formation started early.
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John Timmer on the discovery of what maybe the oldest planets in the universe. Read more at Ars Technica

/ D. enigmata on the right, with the three larger samples on the left representing D. discoides.