The Chicxulub crater is an impact crater buried underneath the Yucatán Peninsula in Mexico. Its center is offshore near the community of Chicxulub, after which it is named. It was formed slightly over 66 million years ago when a large asteroid, about ten kilometers in diameter, struck Earth. The crater is estimated to be 180 kilometers in diameter and 20 kilometers in depth. It is the second largest confirmed impact structure on Earth, and the only one whose peak ring is intact and directly accessible for scientific research. The crater was discovered by Antonio Camargo and Glen Penfield, geophysicists who had been looking for petroleum in the Yucatán Peninsula during the late 1970s. Penfield was initially unable to obtain evidence that the geological feature was a crater and gave up his search. Later, through contact with Alan R. Hildebrand in 1990, Penfield obtained samples that suggested it was an impact feature.

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Study: Non-Avian Dinosaurs Were Not in Decline before Chicxulub Asteroid Impact Wiped Them Out

An 800-foot-tall megatsunami swept over Mars following an ancient asteroid impact as powerful as the dinosaur-killing Chicxulub impact on Earth.

A Martian megatsunami may have been caused by an asteroid collision similar to the Chicxulub impact – which contributed to the mass extinction of all non-avian dinosaurs on Earth 66 million years ago – in a shallow ocean region

Chicxulub-Like Asteroid Caused Megatsunami on Early Mars

Seismic Activity after Dinosaur-Killing Chicxulub Impact Lasted Weeks to Months: Study

Dinosaur-Killing Chicxulub Impact Produced Global Tsunami, New Research Suggests

African Crater Adds an Asteroid Strike to the Late Dinosaur Era. The impact that made the submarine depression probably occurred close to the dinosaur-ending Chicxulub event, but researchers say much remains to be learned.

Dinosaurs’ Last Spring: Groundbreaking Study Pinpoints Timing of Chicxulub Asteroid Impact

Chicxulub Impact Occurred during Northern Spring or Summer: Study

Dinosaurs’ last spring: Study pinpoints timing of Chicxulub asteroid impact

'Dark Asteroid' Was Behind The Dinosaur-Killing Chicxulub Impact, Scientists Say

Dinosaur-Killing Chicxulub Asteroid Came from Outer Part of Main Belt, Study Suggests

Fossilized Tsunami 'Megaripples' Reveal The Devastation From The Chicxulub Asteroid

Dinosaur Biodiversity Declined before Chicxulub Asteroid Impact: Study

Giant Meteorite Landed in Ukraine 650,000 Years after Dinosaur-Killing Chicxulub Event

Chicxulub Impact Changed Tropical Rain Forest Biodiversity Forever

Dinosaur-Killing Chicxulub Asteroid Gave Rise to Modern Neotropical Rainforests, Study Shows

How the Chicxulub impactor gave rise to modern rainforests

Asteroid dust found at Chicxulub Crater confirms cause of dinosaurs’ extinction 66 million years ago.

Geologists Find Asteroid Dust inside Chicxulub Impact Crater