3 min read Continents were on the move in the Cretaceous, busy remodeling the ... and ammonites—perished in the extinction event at the end of the period 65 million years ago.

Scientists have discovered levels of iridium 30 times greater than average in the Cretaceous/Tertiary (KT) boundary, the layer of sedimentary rock laid down at the time of the dinosaur extinction.

However, the Cretaceous–Paleogene extinction event was not the worst loss of life in our planet’s history. That distinction belongs to the Permian-Triassic extinction or the Great Dying.

Earth’s long history has seen an uncountable number of species come and go – but one of the most famous extinction events ... Cretaceous-Paleogene (K-Pg) boundary, formerly the Cretaceous ...

That individual animal lived not so long before the Cretaceous-Tertiary extinction that wiped out many of Earth's species some 65 million years ago. Brachychampsa had short teeth and a large mouth ...

Today’s extinction rates are sky-high. But scientists debate if that’s sufficient evidence to conclude that Earth is undergoing a mass extinction event—or whether that ... depiction of marine life ...

Extinction is inevitable ... The most recent of these events occurred at the end of the Cretaceous period, 66 million years ago, following an asteroid collision off the shore of Mexico.