Earth’s ancient ‘greenhouse’ conditions were hotter than thought
网页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 ...
网页June 3, 2024 at 11:00 am. Earth may have had fresh, not just salty, water as soon as 600 million years after the planet formed — a mere blink of an eye in geologic time. Researchers analyzed ...
Meteorites suggest ancient Earth once had an atmosphere rich in …
网页2020年1月29日 · New simulations of such reactions in 2.7-billion-year-old meteorites suggest Archean Earth’s atmosphere had a lot of CO 2. Earth’s atmosphere 2.7 billion years ago may have been more than two ...
Earth’s oldest known earthquake was probably triggered by plate …
网页2024年3月28日 · By Lucas Van Wyk Joel. March 28, 2024 at 9:00 am. Scientists studying rocks in South Africa report evidence for the earliest known earthquake triggered by plate tectonics. The temblor struck more ...
How ancient oceans of magma may have boosted Earth’s oxygen …
网页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 richer in oxygen than it ...
Ancient trees’ gnarled, twisted shapes provide irreplaceable habitats
网页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 because they’re old ...
Young and Restless: Ancient Earth shows moving crust - Science …
网页March 21, 2007 at 7:39 am. Tectonic movements of Earth’s crust began at least 3.8 billion years ago, according to new evidence from the oldest known rock formation. HARD EVIDENCE. Layers of ...
How plate tectonics upended our understanding of Earth
网页2021年1月13日 · The planet’s ancient rocks bear traces of life dating to at least 3.4 billion years ago, several hundred million years before the earliest known evidence for any plate motions, in the form of ...
NASA's Perseverance finds its first possible hint of ancient Mars life
网页By Lisa Grossman. July 25, 2024 at 7:52 pm. NASA’s Perseverance rover has bagged its first hint of ancient microbes on Mars. “We’re not able to say that this is a sign of life,” says ...
An ancient impact on Earth led to a cascade of cratering - Science …
网页2022年2月22日 · An ancient impact on Earth led to a cascade of cratering. This crater in southeastern Wyoming, roughly 60 meters across at its widest point, is just one of many that may have been created by the ...