WASHINGTON -- They just needed some leg room: New research shows the great dinosaur die-off made way for mammals to explode in size -- some more massive than several elephants put together. The ...

Some time during the Cretaceous Period, 120 million years ago, a dinosaur wolfed down its last meal — a small mammal the size of a mouse. And it's still there. A researcher with a sharp eye spotted ...

Only 7% of LAist readers currently donate to fund our journalism. Help raise that number, so our nonprofit newsroom stays strong in the face of federal cuts. Donate now. Sixty-six million years ago, ...

The museum tapped artists — including Chicago rock screenprinter Jay Ryan — to visualize a 15-million-year period in time ...

A mammal phylogeny with colors depicting the diet of living species and their ancestors; silhouettes of myrmecophagous mammals surround the tree. An inset diagram in the upper right illustrates ...

WASHINGTON — They just needed some leg room: New research shows the great dinosaur die-off made way for mammals to explode in size — some more massive than several elephants put together. The largest ...