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28 de jun. de 2024 · Around 50 000 years ago, an iron-nickel meteorite, estimated to be 30-50 m wide, smashed into North America and left a massive hole in what is today known as Arizona. The violent impact created a bowl-shaped hole of over 1200 m across and 180 m deep in what was once a flat, rocky plain.
16 de jul. de 2024 · How many meteors could you see this year? Generally, the Perseids produce between 50 and 100 meteors per hour during the peak of the shower. There can also be fireballs, ...
Hace 1 día · The dashboard displays the next five Earth approaches to within 4.6 million miles (7.5 million kilometers or 19.5 times the distance to the moon); an object larger than about 150 meters that can approach the Earth to within this distance is termed a potentially hazardous object.
Hace 1 día · An estimated 500 meteorites reach the surface each year, but only 5 or 6 of these typically create a weather radar signature with a strewn field large enough to be recovered and be made known to scientists.
28 de jun. de 2024 · The researchers found that Mars experiences around 280 to 360 meteorite impacts every year that produce craters larger than eight metres in diameter and shake the red planet’s surface.
12 de jul. de 2024 · The last ancestor shared by all living organisms was a microbe that lived 4.2 billion years ago, had a fairly large genome encoding some 2600 proteins, enjoyed a diet of hydrogen gas and carbon dioxide, and harbored a rudimentary immune system for fighting off viral invaders.
16 de jul. de 2024 · The extinction of dinosaurs happened about 66 million years ago. It's linked to the second-largest known meteorite impact on Earth, the deeply buried Chicxulub crater in Mexico.
