Geography

Rare-earths become water-repellent only as they age

Rare-earths become water-repellent only as they age

Surfaces that have been coated with rare earth oxides develop water-repelling properties only after contact with air. Even at room temperature, chemical reactions begin with...
Huns and settlers may have cooperated on the frontier of Roman Empire

Huns and settlers may have cooperated on the frontier of Roman Empire

Analysis of isotopes in bones and teeth from fifth-century cemeteries suggests that nomadic Huns and Pannonian settlers on the frontier of Roman Empire may...
Last remnant of North American ice sheet on track to vanish

Last remnant of North American ice sheet on track to vanish

The last piece of the ice sheet that once blanketed much of North America is doomed to disappear in the next several centuries, says...
Courtship behavior trapped in 100-million-year-old amber

Courtship behavior trapped in 100-million-year-old amber

Courtship behaviors, frequent among modern insects, have left extremely rare fossil traces. In odonates, the male must persuade the female to mate in tandem and...
Human Skull Evolved Along with Two-Legged Walking

Human skull evolved along with two-legged walking

The evolution of bipedalism in fossil humans can be detected using a key feature of the skull -- a claim that was previously contested...
Widespread platinum may help solve Clovis people mystery

Widespread platinum may help solve Clovis people mystery

No one knows for certain why the Clovis people and iconic beasts -- mastodon, mammoth and saber-toothed tiger - living some 12,800 years ago...
Earth's crust

Earth’s first example of recycling — its own crust!

Rock samples from northeastern Canada retain chemical signals that help explain what Earth's crust was like more than 4 billion years ago, reveals new...
Parts of the Earth's original crust remain in place today

Parts of the Earth’s original crust still remain in place today

Analysis of rock samples harvested from the Canadian Shield suggests the samples contain components of Earth's crust that existed more than 4.2 billion year...
Is spring getting longer?

Is spring getting longer?

With the first day of spring around the corner, temperatures are beginning to rise, ice is melting, and the world around us is starting...
Recovery after 'great dying' was slowed by more extinctions

Recovery after ‘great dying’ was slowed by more extinctions

Researchers studying marine fossil beds in Italy have found that the world's worst mass extinction was followed by two other extinction events, a conclusion...