Geography

Arctic river ice deposits rapidly disappearing

Arctic river ice deposits rapidly disappearing

Climate change is causing thick ice deposits that form along Arctic rivers to melt nearly a month earlier than they did 15 years ago,...
The dangers of being a saber-toothed cat in Los Angeles 12,000 years ago

The dangers of being a saber-toothed cat in Los Angeles 12,000 years ago

Saber-toothed cats that roamed Los Angeles 12,000 years ago had many injuries to their shoulders and backbones that likely occurred when they killed large...
“Nesting doll” minerals offer clues to Earth’s mantle dynamics

“Nesting doll” minerals offer clues to Earth’s mantle dynamics

Recovered minerals that originated in the deep mantle can give scientists a rare glimpse into the dynamic processes occurring deep inside of the Earth...
Could a Colorado earthquake have been triggered by dinosaur extinction impact?

Could a Colorado earthquake have been triggered by dinosaur extinction impact?

Researchers have found signs of fault displacement at well-known rock outcrops in Colorado that mark the end-Cretaceous asteroid impact that may have hurried the...
Did a comet cause freeze that killed mammoths?

Did a comet cause freeze that killed mammoths?

A comet or asteroid striking the Earth around 13,000 years ago caused the climate to cool, leading to the vanishing of megafauna like mammoths...
Researchers discover Moabosaurus in Utah's 'gold mine'

Researchers discover Moabosaurus in Utah’s ‘gold mine’

Move over, honeybee and seagull: it's time to meet Moabosaurus utahensis, Utah's newly discovered dinosaur, whose past reveals even more about the state's long-term history. The Moabosaurus discovery was...
New night lights maps open up possible real-time applications

New night lights maps open up possible real-time applications

NASA scientists are releasing new global maps of Earth at night, providing the clearest yet composite view of the patterns of human settlement across...
Scientists discover fossil of dinosaur ancestor with surprising croc-like appearance

Scientists discover fossil of dinosaur ancestor with surprising croc-like appearance

Scientists have long wondered what the earliest dinosaur relatives looked like. Most assumed they would resemble miniature dinosaurs, about the size of chickens, and walk...
Scientists fill critical gap in fossil record of Chinese phytosaurs

Scientists fill critical gap in fossil record of Chinese phytosaurs

The skeleton of a small, short-snouted reptile found in China was recently identified as the oldest known member of the phytosaurs--an extinct group of...
North America's freshwater lakes are getting saltier

North America’s freshwater lakes are getting saltier

North America's freshwater lakes are getting saltier due to development and exposure to road salt. A study of 371 lakes published in the Proceedings of the...