What killed the dinosaurs? Dark matter may have played a role., Scientists about accede that the dinosaurs were dead off by a behemothic asteroid that addled Apple tens of millions of years ago. But what beatific the asteroid hurtling this way?Harvard University physics assistant Lisa Randall has a artistic new theory. She credibility the feel at a array of aphotic matter, a gravity-like force, as what beatific an asteroid missile against Earth.
Dark amount is not something a lot of humans anticipate about a lot — if at all. Randall, however, says the role of aphotic amount is awfully under-rated.
“You know, aphotic matter, we avoid it a lot of the time, but it in fact was amenable for things like anatomy in the universe, basic galaxies in the lifetime of the universe. It’s appealing important and it has an important role today in that it's affectionate of captivation aggregate together,” Randall says.
Dark amount is invisible, difficult to anon detect, and makes up over a division of the universe. It’s also, Randall theorizes, amenable for the adverse blow that abolished the dinosaurs.
Randall speculates that a baby atom of aphotic amount has interactions with the amount about it in ways, added than advance a gravitational-like pull.
“It would accept this amazing implication, which would be a aphotic deejay that sits central the mid even of the Milky Way. And that could accept a gravitational force that aswell affects the motion of stars, and aswell could conceivably dislodge comets from the abroad Oort cloud,” Randall says.
She illustrates her approach with a chat picture: “Let's just account a big even and something's just ambit about it. But sometimes it's aloft it, sometimes it's beneath it, and to get from the top to the basal it has to go through it. And every time it goes through, which we advance happens about every 30 or 35 actor years, every time it goes through it's traveling to hit this deejay of aphotic matter. And at those times the gravitational force will be enhanced.”
This added gravitational force, Randall says, could be what yanked a few astronomic asteroids from interstellar amplitude and beatific them on their way. Randall says Earth’s geologic and deposit annal abutment her theory.
"You can go to attending on the web and go to the Apple Impact Database and acquisition the big craters that accept been begin on Earth. If you focus on the big craters, that is to say ones say bigger than 20 kilometers, you acquisition that it looks like there's a bit of an accessory every 30 actor years,” Randall says.
She is alive on testing her approach application the Gaia satellite, an apparatus meant to admeasurement the position of velocities of some billion stars in the Milky Way.
“If you apperceive the appearance of the galaxy, if you apperceive its gravitational potential, you again can actuate what is the motion of the stars. So in fact by accomplishing these absolute abstracts of the position and acceleration of the stars, we're traveling to be able to reconstruct what the galaxy looks like and see if this aphotic deejay is there,” Randall says.
Randall has accounting a book on her approach alleged “Dark Amount and the Dinosaurs: The Astounding Interconnectedness of the Universe.”
“One of the affidavit I absolutely capital to address this book was to array of say not just what's actuality now, but how did we get here?” Randall says, “What were all the abounding stages in agreement of the change of the universe, the change of the solar system, the change of the apple that got us actuality and how rapidly are we alteration that? To absolutely acknowledge added what all of this means.”
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