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Asteroid dust caused 15-year winter that killed dinosaurs: study

31Oct

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Technology

Asteroid dust caused 15-year winter that killed dinosaurs: study

[ad_1] Around 66 million years ago, an asteroid bigger than Mount Everest smashed into Earth, killing off three quarters of all life on the planet -- including the dinosaurs.This much we know. But exactly how the impact of the asteroid Chicxulub caused all those animals to go extinct has remained a matter of debate. The leading theory recently has been that sulphur from the asteroid's impact -- or soot from global wildfires it sparked -- blocked out the sky and plunged the world into a long, dark winter, killing all but the lucky few.However research published Monday based on particles found at a key fossil site reasserted an earlier hypothesis: that the impact winter was caused by dust kicked up by the asteroid.Fine silicate dust from pulverised rock would have stayed in the atmosphere...

NASA warns of close approach by asteroid! 190-ft space rock racing towards Earth

17Jul

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Technology

NASA warns of close approach by asteroid! 190-ft space rock racing towards Earth

[ad_1] An asteroid, given the designation of Asteroid 2020 UQ3, is on its way towards Earth and could make its closest approach to the planet as soon as tomorrow, July 18. NASA revealed these shocking details after tracking the asteroid's orbit using its various satellites and space and ground-based telescopes. As per the details provided by NASA, Asteroid 2020 UQ3 is expected to make its closest approach to the planet at a distance of just 1.2 million kilometers, and at a speed of 33387 kilometers per hour.It belongs to the Apollo group of Near-Earth Asteroids, which are Earth-crossing space rocks with semi-major axes larger than Earth's. These asteroids are named after the humongous 1862 Apollo asteroid, discovered by German astronomer Karl Reinmuth in the 1930s. Is Asteroid 2020 UQ3 ...

Dinosaurs were in the prime when the asteroid struck, study reveals

2Jan

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Technology

Dinosaurs were in the prime when the asteroid struck, study reveals

[ad_1] A new study has shed light into the living conditions of dinosaurs during the time they went extinct. Here's how they fared. Dinosaurs dominated the Earth millions of years ago during the Mesozoic Era. This included three consecutive geological periods - Triassic, Jurassic, and Cretaceous Periods, during which different species of these creatures inhabited the Earth. But how did these predatory creatures go extinct? Well, Paleontologists believe their extinction process started when an asteroid struck the Earth nearly 65 million years ago. Now, a new study has revealed that dinosaurs were in their prime when the fateful asteroid struck, sending them into extinction.The study revealed that dinosaurs were in the prime of their lives during the late Cretaceous period when the aste...

Dinosaur-killing asteroid’s kin probably caused mystery crater on Earth

30Aug

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Technology

Dinosaur-killing asteroid’s kin probably caused mystery crater on Earth

[ad_1] The crater, named “Nadir” after the nearby volcano Nadir Seamount, is of the same age as the Chicxulub impact caused by a huge asteroid. The ocean floor is famously less explored than the surface of Mars. And when our team of scientists recently mapped the seabed, and ancient sediments beneath, we discovered what looks like an asteroid impact crater.Intriguingly, the crater, named “Nadir” after the nearby volcano Nadir Seamount, is of the same age as the Chicxulub impact caused by a huge asteroid at the end of the Cretaceous period, around 66 million years ago, which wiped out the dinosaurs and many other species. The finding, published in Science Advances, raises the question of whether the crater might be related to...