Taxonomy term


19th-century discovery now reveals modern human arrival in Sumatra

Modern humans began journeying out of Africa by at least 75,000 years ago, eventually expanding across the planet. Evidence of these early human travels, including fossils and artifacts, is typically spotty and difficult to find. But one such discovery more than a century ago has shed new light on the appearance of humans in Southeast Asia.

19 Dec 2017

Climate change linked to specific weather events for the first time

Three extreme weather events that occurred in 2016 would not have been possible in Earth’s pre-industrial climate, according to the sixth annual report on the attribution of extreme weather events issued Dec. 13 by NOAA and the American Meteorological Society (AMS). This marks the first time that researchers have concluded that a specific weather event would not have been possible without the influence of humans.

14 Dec 2017

Both urban flooding and rural drying to intensify

In a comprehensive global analysis, including data from more than 43,000 rainfall stations and 5,300 river monitoring stations in 160 countries, researchers report that global rainfall is increasing, likely due to warming air temperatures that allow more moisture into the atmosphere, causing more intense rainfall. Rural areas tend to absorb excess water during storms, preventing widespread flooding in rural zones, but between storms, rising temperatures also mean more evaporation from exposed soils, creating drier conditions over the long term, the team noted in Scientific Reports. Meanwhile, in urban environments, more intense rainfall often overwhelms stormwater catchments in places with less exposed soil, leading to a higher incidence of flooding.

11 Dec 2017

Red Planet Roundup: December 2017

With two rovers patrolling the surface of Mars, six spacecraft orbiting above it, and scientists here on Earth studying the Red Planet from afar, new findings are announced often. Here are a few of the latest updates.

08 Dec 2017

Transitional Chilesaurus fills gap between major dinosaur groups

In 2015, a new dinosaur was discovered in southern Chile, but its odd set of characteristics left paleontologists scratching their heads: Was it a carnivore or an herbivore? A closer look at the bones of the dinosaur, named Chile­saurus, is helping scientists determine how it fit into the Late Jurassic landscape.

06 Dec 2017

What drives hot spots of sea-level rise?

As sea levels creep up around the world, scientists have observed hot spots where regional rates of sea-level rise greatly outpace the global average. But what drives the formation of these hot spots, and how long they last, have been mysteries. In a new study, scientists tracking sea levels along the Florida coast suggest that the combined effects of two naturally occurring climate processes, the El Niño-Southern Oscillation (ENSO) and the North Atlantic Oscillation (NAO), control sea-level hot spot formation along the U.S. East Coast.

01 Dec 2017

Dino deaths cleared the way for frogs

Frogs make up almost 90 percent of amphibians, and with 6,775 described species, frogs are considered one of the most diverse groups of vertebrates on the planet. In a new study in Proceedings of the National Academy of Sciences, researchers indicate that frogs’ rapid diversification stems back to the Cretaceous-Paleogene (K-Pg, formerly the K-T) boundary, about 66 million years ago, when nonavian dinosaurs and many other animals went extinct.

30 Nov 2017

Caldera clays may hold key to lithium independence

Most of the world’s lithium is mined in South America and Australia. New research suggests that the United States may have its own untapped lithium supplies in lake deposits in the calderas left behind by large volcanic eruptions. In the study, published in Nature Communications, researchers detail a new way to detect deposits of the silvery white metal in places such as Crater Lake in southern Oregon.

28 Nov 2017

Can fossil footprints reveal the weight of a dinosaur?

Body mass is a fundamental factor in determining how much food an animal requires, how it moves and grows, and what role it plays in its ecosystem. Measuring modern animals is often a straightforward matter of putting them on a scale, but it’s no easy feat for paleontologists interested in extinct creatures like dinosaurs, since many of these animals’ weighty parts — their organs, muscles and skin, for example — are long gone. Frequent claims of “the heaviest dinosaur of all time,” for example, as in the case of the recently named Patagotitan, are fraught with uncertainty. Recent research, however, is offering a novel approach to estimating dinosaur body masses by examining the footprints they left behind.

27 Nov 2017

Seismic patterns help forecast eruptions from quiet stratovolcanoes

Earth is home to more than 1,500 potentially eruptive volcanoes on land, each with a unique character and history. Predicting when and how a particular volcano may erupt is notoriously difficult, in large part because each eruption is unique. Recent work tracking pre-eruptive seismic behavior beneath two dozen reawakened volcanoes has revealed a distinctive pattern that seismologists may be able to use to assess when — and how violently — a rumbling volcano could blow its top.

24 Nov 2017