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The Chicxulub impactor is the most consequential asteroid in Earth's history and the reason planetary defence is a funded discipline. Every kinetic-impact test flown since is a response to what happened 66 million years ago.
Chicxulub is buried under half a kilometre of sediment and half of it sits offshore. Gravity and magnetic surveys — the kind flown on aircraft and satellites — outlined the ring structure long before anyone drilled it.
Strictly speaking, so is every eagle. The bird on our badge belongs to the only dinosaur lineage that made it through the extinction — which felt like the right mascot for a company in the survival-and-flight business.
We keep a second collection about the universe beyond this planet — 55 facts on planets, stars, exploration and the strange physics of orbit.