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Free-air gravity anomaly over the Chicxulub structure (coastline and state boundaries shown as black lines) The Chicxulub crater (IPA: [t͡ʃikʃuˈluɓ] ⓘ cheek-shoo-LOOB) is an impact crater buried underneath the Yucatán Peninsula in Mexico. Its center is offshore, but the crater is named after the onshore community of Chicxulub Pueblo ...
The Cretaceous–Paleogene (K–Pg) extinction event, [a] also known as the K–T extinction, [b] was the mass extinction of three-quarters of the plant and animal species on Earth [2][3] approximately 66 million years ago. The event caused the extinction of all non-avian dinosaurs.
An impact winter is a hypothesized period of prolonged cold weather due to the impact of a large asteroid or comet on the Earth 's surface. If an asteroid were to strike land or a shallow body of water, it would eject an enormous amount of dust, ash, and other material into the atmosphere, blocking the radiation from the Sun.
Luis Walter Alvarez, left, and his son Walter, right, at the K–T Boundary in Gubbio, Italy, 1981. The Alvarez hypothesis posits that the mass extinction of the non-avian dinosaurs and many other living things during the Cretaceous–Paleogene extinction event was caused by the impact of a large asteroid on the Earth.
The peak of the Orionid meteor shower is Oct. 21, per NASA. This year, NASA's Watch the Skies blog writes that they can be best viewed on the mornings of Sunday, Oct. 20, and Monday, Oct. 21.
The peak of the Leonid meteor shower will shoot across the sky on the night of Nov. 17-18. The yearly spectacle occurs when the Earth passes through the debris field left behind by the comet 55P ...
The Comet research group (CRG), dedicated to investigating the YDIH, was established in 2016. [2] The credibility and motivations of individual CRG researchers have been questioned by critics of the impact hypothesis, including their specific claims for evidence in support of the YDIH and/or the effects of meteor air bursts or impact events on ancient settlements, people, and environments. [2]
The Geminid meteor shower, one of the strongest and most reliable annual showers, will peak this Thursday — and viewers could see up to 120 meteors per hour.