Asteroid 2024 YR4 was Earth’s first real-life defense test
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Arden Culton
November 18, 2025
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Editors’ notes This article has been reviewed according to Science X’s editorial process and policies. Editors have highlighted the following attributes while ensuring the content’s credibility: fact-checked reputable news agency proofread by Nick Perry A top panel of geologists has decided not to grant the ‘human age’ its own distinct place in earth’s geological timeline.
Credit: NASA, ESA/Andreas Mogensen This high exposure photograph revealed Earth’s atmospheric glow against the backdrop of a starry sky in this image taken from the International Space Station on Jan. 21, 2024. At the time, the orbital lab was 258 miles above the Pacific Ocean northeast of Papua New Guinea. The Nauka science module and
Tooth traces of an Allosaurus dinosaur in the bone of an Apatosaurus, from the Late Jurassic Period, about 150 million years ago. The specimen is from the Dinosaur Journey Museum in Colorado. Credit: Anthony Martin The ordinary person looks at Stone Mountain and sees a solid, unmovable monolith. Emory paleontologist Anthony Martin, who thinks in…