Xenothrix's close relative, the red titi monkey (Callicebus cupreus).

Primates of the Caribbean: Ancient DNA reveals history of mystery monkey

UNLV geologist Stephen Rowland discovered that a set of 28 footprints left behind by a reptile-like creature 310 million years ago are the oldest ever to be found in Grand Canyon National Park.

Reptile tracks oldest ever found in Grand Canyon

Scientists theorize new origin story for Earth’s water

The skull of the holotype specimen of C. parvus (JLUM L0304-j-Zn2).

The teeth of Changchunsaurus: Rare insight into ornithopod dinosaur tooth evolution

Ostrocod

Tiny, ancient fossil shows evidence of the breath of life

Teeth of Simiolus minutus, which currently reside in the National Museum of Kenya, Nairobi, were found in the Tugen Hills of Kenya.

Tiniest ever fossil ape discovered in Kenya

The wavy appearance of the enamel of Changchunsaurus in thin section and under cross-polarized light.

Chew on this: Two new studies reveal secrets of early dinosaur...

Plate Tectonics

Enhanced views of Earth tectonics

Deposits from a landslide outside Pahrump, Nevada.

Nobody wins in a landslide

Christopher DuRoss of the USGS updates maps of the trench walls while sitting on one of the benches excavated across the sackungen. Flags on the wall denote different layers of sediment the team identified that moved during past earthquake events. Credit: Ryan Gold.

Punctuated earthquakes for New Madrid area: New research uncovers cluster of...

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