The deadliest mass extinction of all took a long time to kill 90 percent of Earth’s marine life–and it killed in stages–according to a newly published report. It shows that mass extinctions need not ...

The discovery of what could be the youngest fossil of a dinosaur to date--from a period notorious for being free of their remains--has reignited a clash among paleontologists about what caused the ...

Global warming may be to blame for the gradual extinction of cold-loving species, and the European land leech in particular, according to Ulrich Kutschera and colleagues from the University of Kassel ...

Extinction implies that the species that perish are poorly adapted to a changing set of conditions. Faced with an evolving group of competing organisms -- the mammals -- perhaps dinosaurs were driven ...