In recent research published by myself and my colleague Tony Yeates in the journal Tectonophysics, we investigate what we believe — based on many years of experience in asteroid impact research — is the world’s largest known impact structure, buried deep in the Earth in southern New South Wales. The Deniliquin structure, yet to be ...
About two billion years ago, an impactor hurtled toward Earth, crashing into the planet in an area near present-day Johannesburg, South Africa. The impactor — most likely an asteroid — formed what is today the biggest crater on our planet. Based on previous research, scientists have widely accepted that the impact structure, known as the ...
As NASA prepares to usher in a new form of planetary defense, one Johns Hopkins engineer will be eagerly awaiting the big collision with an asteroid that she is helping orchestrate. Elena Adams, the mission systems engineer at the Johns Hopkins Applied Physics Laboratory, and her team will spend the next two weeks carefully observing Didymos, ...
Planetary defense researchers at Lawrence Livermore National Laboratory (LLNL) continue to validate their ability to accurately simulate how they might deflect an Earth-bound asteroid in a study that will be published in the American Geophysical Union journal Earth and Space Science. The study, led by LLNL physicist Tané Remington, also identified sensitivities in the code ...
The beginning of the end caused by a meteor strike started with violent shaking that raised giant waves in the waters of an inland sea in what is now North Dakota. Then, tiny glass beads began to fall like birdshot from the heavens. The rain of glass was so heavy it may have set fire ...
The extinction of woolly mammoths has been a hotly debated topic among scientists, with theories of asteroid collisions, diseases, and human hunting coming up as probable causes. A newly discovered crater in Greenland now gives credence to the idea that the mammoth extinction may have been brought about as a result of an asteroid collision. ...
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