Earth’s ancient ‘greenhouse’ conditions were hotter than thought
2024年9月19日 · A timeline of 485 million years of Earth’s surface temperatures shows ancient greenhouse conditions were hotter than scientists thought.
Freshwater first appeared on Earth 4 billion years ago, ancient ...
2024年6月3日 · An analysis of ancient zircon crystals from the Jack Hills formation (shown in a satellite image) in Western Australia suggests freshwater was cycling on Earth hundreds of …
Meteorites suggest ancient Earth once had an atmosphere rich in …
2020年1月29日 · Earth’s atmosphere 2.7 billion years ago may have been more than two-thirds carbon dioxide. That finding comes from a new study that simulates how the ancient …
Earth’s oldest known earthquake was probably triggered by plate …
2024年3月28日 · Earth Ancient zircons may record the dawn of plate tectonics By Nikk Ogasa May 2, 2022. Earth 50 years ago, scientists thought they had found Earth’s oldest rocks By ...
Ancient trees’ gnarled, twisted shapes provide irreplaceable habitats
2024年2月23日 · Earth’s oldest, knotted and scarred pine trees are a boon for forest life. These old mountain pines (Pinus uncinata) offer food and shelter for lichens and insects not just …
An ancient impact on Earth led to a cascade of cratering - Science …
2022年2月22日 · An ancient impact on Earth led to a cascade of cratering. Blocks of material blasted from one large crater created a wealth of smaller craters. This crater in southeastern …
Young and Restless: Ancient Earth shows moving crust - Science …
2007年3月21日 · Over Earth’s history, most of the original crust has recycled by sinking into the planet’s hot interior, melting, and heading back toward the surface. However, a few pieces of …
Roughly 90 million years ago, a rainforest grew in Antarctica
2020年4月1日 · The pollen in the core suggested that this soggy, ancient forest was home to conifers, ferns and flowering shrubs, as well as mats of bacteria (SN: 5/16/11). Sediment …
Earth’s rarest diamonds form from primordial carbon in the mantle
2020年9月14日 · But diamonds with the deepest origins — such as the famed Hope Diamond — are made of carbon from a separate source: a newly discovered, ancient reservoir hidden in …
How ancient oceans of magma may have boosted Earth’s oxygen …
2019年9月3日 · We may have ancient magma oceans to thank for Earth’s breathable air. Shortly after the planet’s formation about 4.5 billion years ago, the mantle somehow became much …