Scientists Set to Start Drilling at Asteroid Impact Site That Wiped out the Dinosaurs

Scientists are going to ground-zero of one of Earth's most notable disasters—to the Chicxulub crater to dig to the heart of the asteroid that collided into the Earth 66 million years ago.

Scientists are going to ground-zero of one of Earth's most notable disasters—to the Chicxulub crater to dig to the heart of the asteroid that collided into the Earth 66 million years ago.

“[A]t 66 million years ago an asteroid the size of Denver traveling 20 times the speed of a bullet crashes into the Yucatan Peninsula and causes a massive extinction of all animals that are larger than dogs on the planet,” said Kirk Johnson, the Sant Director of the National Museum of Natural History.

The origins of the asteroid extinction theory are fairly recent. Luis Alvarez and his son, Walter, proposed the impact hypothesis back in 1980. They came to this conclusion after observing samples of clay from  Italy, Denmark, and New Zealand, which they noticed had "iridium increases of about 30, 160, and 20 times, respectively, above the background level at precisely the time of the Cretaceous-Tertiary extinctions, 65 million years ago." Iridium is an rare element found in the Earth's crust, but can be found in abundance in meteors and asteroids. However, this idea wouldn't be fully accepted by the scientific community until the 1990s when this "Crater of Doom" was discovered off the Yucatan Peninsula.

This discovery helped answer a question that had caused much debate within the scientific community (back to when the first dinosaur fossil have been uncovered). But we have yet to know how life bounced back.

What followed this devastating event remains somewhat of a mystery. We know a mass extinction event followed. Some scientists suggest the asteroid may have triggered a series of volcanic eruptions, further disrupting the Earth's climate. But how did life begin to rebuild?

That's what this team of researchers want to find out—what happened between then an now? They will begin drilling at the impact site on April 1 and plan to penetrate up to 5,000 feet beneath the seabed. The scientists will be sampling from the crater's "peak ring," which is a ring of elevated rocks that surround the crater's center.

"What are the peaks made of? And what can they tell us about the fundamental processes of impacts, which is this dominant planetary resurfacing phenomena?" said Sean Gulick, a researcher at The University of Texas at Austin Institute for Geophysics.

The scientists are interested in what kind of life the rocks from the site might harbor. These microbes that lived in this crater would not have survived off the energy of carbon and oxygen, but from the iron and sulfur left after impact. Researchers will look at the DNA of microbes found within the rocks from the site, as well as the rocks themselves to gauge how the impact changed the environment at various geological stages.

"The sediments that filled in the [crater] should have the record for organisms living on the sea floor and in the water that were there for the first recovery after the mass extinction event," Gulick said. "The hope is we can watch life come back."


Photo Credit: KAY NIETFELD/AFP/Getty Images

Yucatan Peninsula: NASA with scale and labels to increase clarity by David Fuchs

gif: University of Arizona, Space Imagery Center

Natalie has been writing professionally for about 6 years. After graduating from Ithaca College with a degree in Feature Writing, she snagged a job at where she had the opportunity to review all the latest consumer gadgets. Since then she has become a writer for hire, freelancing for various websites. In her spare time, you may find her riding her motorcycle, reading YA novels, hiking, or playing video games. Follow her on Twitter: @nat_schumaker

Why a federal judge ordered White House to restore Jim Acosta's press badge

A federal judge ruled that the Trump administration likely violated the reporter's Fifth Amendment rights when it stripped his press credentials earlier this month.

WASHINGTON, DC - NOVEMBER 16: CNN chief White House correspondent Jim Acosta (R) returns to the White House with CNN Washington bureau chief Sam Feist after Federal judge Timothy J. Kelly ordered the White House to reinstate his press pass November 16, 2018 in Washington, DC. CNN has filed a lawsuit against the White House after Acosta's press pass was revoked after a dispute involving a news conference last week. (Photo by Alex Wong/Getty Images)
Politics & Current Affairs
  • Acosta will be allowed to return to the White House on Friday.
  • The judge described the ruling as narrow, and didn't rule one way or the other on violations of the First Amendment.
  • The case is still open, and the administration may choose to appeal the ruling.
Keep reading Show less

How to split the USA into two countries: Red and Blue

Progressive America would be half as big, but twice as populated as its conservative twin.

Image: Dicken Schrader
Strange Maps
  • America's two political tribes have consolidated into 'red' and 'blue' nations, with seemingly irreconcilable differences.
  • Perhaps the best way to stop the infighting is to go for a divorce and give the two nations a country each
  • Based on the UN's partition plan for Israel/Palestine, this proposal provides territorial contiguity and sea access to both 'red' and 'blue' America
Keep reading Show less

Scientists just voted to change the definition of a kilogram

The definition of a kilogram will now be fixed to Planck's constant, a fundamental part of quantum physics.

Greg L via Wikipedia
Surprising Science
  • The new definition of a kilogram is based on a physical constant in quantum physics.
  • Unlike the current definition of a kilogram, this measurement will never change.
  • Scientists also voted to update the definitions of several other measurements in physics.
Keep reading Show less