7,846 results
7,846 results for: Geology
- Earth
Straight Flush
Scientists are evaluating the results of the flood they unleashed in the Grand Canyon last November, hoping that it will restore sandbars and beaches along the Colorado River just downstream of Arizona's Glen Canyon Dam.
- Planetary Science
An early cosmic wallop for life on Earth?
New evidence from lunar meteorites suggests that debris bombarded the moon some 3.9 billion years ago, about the same time that life may have formed on Earth.
- Earth
Sprawl’s aquatic pollution
A new study links the traffic associated with urban sprawl to an unexpectedly large rain of air pollutants entering local waters.
- Earth
A slump or a slide? Density decides
Using a full-scale simulator, researchers showed that just a small difference in soil density determines whether a landslide becomes a fast-moving killer or merely one that slowly slumps downhill.
- Humans
From the September 8, 1934, issue
Ditches on the moon's surface, 12,000-year-old bones and dart points, and nature as waves of knowledge in the mind.
- Earth
New database describes all the marbles
Analyses of the isotope ratios of carbon and oxygen in hundreds of samples of Greek marble may help researchers identify the quarries that supplied the stone for some of Europe's most famous statues and architecture.
- Physics
Primordial Nukes
The rocky remains of nuclear reactors that formed spontaneously in African uranium deposits 2 billion years ago are yielding striking new details about their operation as well as signs that a fundamental aspect of the universe may have once been stronger than it is today.
- Humans
From the August 11, 1934, issue
Ruins of magnificent Assyrian palace uncovered, termites need fungus to thrive, and Homo sapiens thought to be 10 million years old.
- Materials Science
Nanotubes take on the Grand Canyon
A new technique can turn forests of carbon nanotubes into a foamlike material with ideal properties for making lightweight shock absorbers.
- Earth
When Mountains Fizz
Scientists are finding that the driving force behind a volcanic explosion is the same thing that propels spewing soda pop: bubbles.
- Earth
Blueberry Hills: Utah nodules resemble some found on Mars
Analyses of small iron oxide nodules found within certain sandstones of the U.S. Southwest could shed light on how similar spherules may have formed on Mars.
- Earth
A Portrait of Pollution: Nation’s fresh water gets a checkup
Virtually all of America's fresh water is tainted with low concentrations of chemical contaminants, according to a new nationwide study.
