7,845 results
7,845 results for: Geology
- Earth
Paved Paradise?
The precipitation-fed runoff that spills from impervious surfaces such as buildings, roads, and parking lots in developed areas increases erosion in streams, wreaks ecological havoc there, and contributes to urban heat islands.
- Physics
Holey Water: Punctured fluid stays riddled
Extreme vibrations and high concentrations of tiny particles, such as cornstarch, in water can create holes in the liquid.
- Paleontology
Crawling through Time: Fish bones reveal past climate change
The timing of ancient migrations of snakehead fish from the Indian subcontinent into Europe, Asia, and Africa tells scientists about temperature and humidity changes in those locations.
- Earth
Air held oxygen early on
Chemical analyses of South African sediments suggest that oxygen was present in small quantities about 2.32 billion years ago, which is at least 100 million years earlier than previously thought.
- Planetary Science
A Titan of a Mission
On Jan. 14, a space probe will plunge through the thick atmosphere of Saturn's moon Titan, looking for insights into the origins of life on Earth.
- Materials Science
Crystal puts pressure on diamonds
A new type of synthetic crystal called moissanite allows researchers to study more material at high pressure than is possible with traditional diamond devices.
- Archaeology
Laser scanners map rock art
Researchers have developed a way to use laser-based surveying equipment to quickly and easily create detailed images of ancient rock art.
- Humans
Young Talent on Display: Tomorrow’s scientists and engineers win recognition, rewards
The three top winners of the 2004 Intel International Science and Engineering Fair hail from high schools on different continents.
- Earth
Killer Waves
Scientists are using sophisticated computer models, field studies of coastal geology, and data from tidal gauges to assess the tsunami risk for coastal residents.
- Planetary Science
Martian sand ripples are taller than Earth’s
New data gathered by a Mars-orbiting probe suggest that large ripples found in sandy areas of the Red Planet are more than twice as tall as their terrestrial counterparts.
- Planetary Science
Signs of Water Flow: Oceans of data point to ancient Martian sea
A robotic rover on Mars has found strong evidence that some rocks near the Martian equator were laid down by a shallow, ancient ocean, indicating one of the most likely places to look for remains of life on the Red Planet.
- Planetary Science
Bone-dry Mars?
The presence of large amounts of olivine, a mineral that undergoes rapid chemical transformation when exposed to liquid water, argues against ancient oceans or lakes on Mars.
