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Mar. 9, 2022 —研究人员已经过时的巨大海华沙妊娠和分娩综合管理t crater, a 31-kilometer-wide meteorite crater buried under a kilometer of Greenlandic ice. The dating ends speculation that the meteorite impacted ...
Apr. 8, 2021 —The 15-million-year-old Nördlinger Ries is an asteroid impact crater filled with lake sediments. A research team has now discovered a volcanic ash layer in the crater. In addition, they show that ...
Mar. 11, 2021 —Several years after scientists discovered what was considered the oldest crater a meteorite made on the planet, another team found it's actually the result of normal geological ...
Feb. 22, 2023 —Countless meteorites have struck Earth in the past and shaped the history of our planet. It is assumed, for example, that meteorites brought with them a large part of its water. The extinction of the ...
Feb. 14, 2022 —Several dozen small impact craters, 10--70-m in size, have been discovered in southeastern Wyoming. A team of U.S. and German geoscientists found these ancient craters in exposed sedimentary layers ...
Feb. 24, 2021 —Researchers believe they have closed the case of what killed the dinosaurs, definitively linking their extinction with an asteroid that slammed into Earth 66 million years ago by finding a key piece ...
Mar. 1, 2023 —Astronomers offer new insight into how deflection missions can protect the planet from future Earth-bound asteroids and ...
July 12, 2022 —What do Mars and Iceland have in common? These days, not so much. But more than 4.5 billion years ago, it's possible the Red Planet had a crust comparable to Iceland today. This discovery, ...
Nov. 1, 2022 —On September 26, NASA's Double Asteroid Redirection Test (DART) spacecraft crashed into Dimorphos, a moonlet of the near-Earth asteroid Didymos, at 14,000 miles per hour. Prior to the impact, ...
June 4, 2021 —A research group has demonstrated that the heat generated by the impact of a small astronomical body could enable aqueous alteration and organic solid formation to occur on the surface of an ...