Interest in human evolution has stimulated new geological work in the southern rift valley of Kenya. A new Geological Society of America Bulletin article by Anna K. Behrensmeyer and colleagues presents the results of more than 15 years of field research on complex strata representing the last 500,000 years of geological history in an active rift system.
A new study, which included experiments at Berkeley Lab, suggests that water may be more common than expected at extreme depths approaching 400 miles and possibly beyond -- within Earth's lower mantle. The study explored microscopic pockets of a trapped form of crystallized water molecules in a sampling of diamonds.
The eastern Mediterranean is experiencing monumental climate changes poised to significantly affect regional ecosystems and human health. According to a new Tel Aviv University study, these changes will drastically alter the duration of summer and winter in the region by the end of this century.
Researchers got a rare opportunity to study an underwater volcano in the Caribbean when it erupted while they were surveying the area.
A growing network of lakes on the Greenland ice sheet has been found to drain in a chain reaction that speeds up the flow of the ice sheet, threatening its stability.
Researchers created small copies of asteroids in the laboratory, and then destroyed them with lasers. The nanosecond laser pulse served as an experimental substitute for a nuclear explosion. The experiments showed high efficiency of nuclear anti-asteroid defense. The study suggests the most effective asteroid destruction criteria, such as the explosion energy needed to eliminate a dangerous object on a collision course with Earth.
Flows of molten metal can generate magnetic fields. This so-called dynamo effect creates cosmic magnetic fields, like those found on planets, moons and even asteroids. Over the coming years, a globally unique Experiment is intended to demonstrate this effect. It will be carried out in the new DRESDYN facility at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), an independent German research laboratory. A recently published study in the scientific journal Physical Review Letters confirms the experiment's chances of success.
During the nighttime, it is hotter in the city than in nearby suburbs or the countryside. But just how much hotter differs between cities. Researchers from the
The amount of water flowing through a river has little influence over long-term changes to its course and the surrounding landscape, research into waterfalls has shown.
High in Mongolia's Gobi Desert, the climate is so dry and cold that glaciers shrank during the last ice age. Dating of rock deposits shows how glaciers in this less-studied region behave very differently as the climate shifts.