Whether or not the asteroid or comet that carved the Chicxulub crater caused the extinction of more than half the planet's species at the end of the Cretaceous remains a matter of scientific debate.

Larger species had slender struts inside hollow ... out to sea in the Cretaceous period. This fish catcher, which had a wingspan of up to 24 feet (7.3 meters), must have regularly soared vast ...

A Danish fossil hunter discovered a 66-million-year-old chunk of fossilised vomit, likely from a fish that couldn't digest sea lilies.