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  1. Há 21 horas · The history of Earth is divided into four great eons, starting 4,540 mya with the formation of the planet. Each eon saw the most significant changes in Earth's composition, climate and life. Each eon is subsequently divided into eras, which in turn are divided into periods, which are further divided into epochs . Eon.

  2. Há 4 dias · Artista ilustra Gliese 12 b e sua estrela — Foto: NASA/JPL-Caltech/R. Hurt (Caltech-IPAC) Localizado a 40 anos-luz de distância, um planeta "potencialmente habitável" foi descoberto por dois ...

  3. Há 4 dias · Precambrian, period of time extending from about 4.6 billion years ago (the point at which Earth began to form) to the beginning of the Cambrian Period, approximately 541 million years ago. The Precambrian represents more than 80 percent of the total geologic record.

  4. Há 1 dia · Approximately 251.9 million years ago, the Permian–Triassic (P–T, P–Tr) extinction event (PTME; also known as the Late Permian extinction event, the Latest Permian extinction event, the End-Permian extinction event, and colloquially as the Great Dying) forms the boundary between the Permian and Triassic geologic periods, and ...

  5. Há 4 dias · Two teams of scientists have discovered a theoretically habitable planet, smaller than Earth but bigger than Venus, orbiting a small star about 40 light-years away. The exoplanet, named Gliese 12b ...

  6. Há 2 dias · The exoplanet Gliese 12 b is tantalizingly close and moderately warm, situated just 40 light-years away around a red dwarf star. The potentially habitable planet could be a good place to search ...