Showing 20 articles starting at article 1461

< Previous 20 articles        Next 20 articles >

Categories: Environmental: Ecosystems, Mathematics: General

Return to the site home page

     (via sciencedaily.com) 

Ancient skulls from the cave systems at Tulum, Mexico, suggest that the earliest populations of North America may have already had a high level of morphological diversity, according to a new study.

     (via sciencedaily.com) 

Before they can get started at their field site - a giant cave studded with stalactites, stalagmites and human artifacts -- 15 undergraduate students must figure out how to use their virtual hands and tools. They also must learn to teleport.

     (via sciencedaily.com) 

New research describes a dynamic climate and vegetation model that explains when regions across Africa, areas of the Middle East, and the Mediterranean were wetter and drier and how the plant composition changed in tandem, possibly providing migration corridors throughout time.

     (via sciencedaily.com) 

New research provides evidence from Siberian caves suggesting that summer sea ice in the Arctic Ocean plays an essential role in stabilizing permafrost and its large store of carbon.

     (via sciencedaily.com) 

Researchers have investigated how the illumination of bat caves affects the animals' behavior and whether the color of light makes a difference on their flight. Although red light irritates the small mammals somewhat less than white light, from the researchers' point of view neither the entrance nor the interior of bat caves should be illuminated if bats are present.

     (via sciencedaily.com) 

A new study by geoscientists and climatologists provides evidence that summer monsoons from Asia and Africa may have reached into the Middle East for periods of time going back at least 125,000 years, providing suitable corridors for human migration.

     (via sciencedaily.com) 

Researchers investigate and describe the conservation importance of buildings relative to natural, alternative roosts for little brown bats in Yellowstone National Park.

     (via sciencedaily.com) 

The Neo-Assyrian Empire, centered in northern Iraq and extending from Iran to Egypt -- the largest empire of its time -- collapsed after more than two centuries of dominance at the fall of its capital, Nineveh, in 612 B.C.E. Despite a plethora of cuneiform textual documentation and archaeological excavations and field surveys, archaeologists and historians have been unable to explain the abruptness and finality of the historic empire's collapse.

     (via sciencedaily.com) 

Identifying geological features in a densely vegetated, steep, and rough terrain can be almost impossible. Imagery like LiDAR can help researchers see through the tree cover, but subtle landforms can often be missed by the human eye.

     (via sciencedaily.com) 

Scientists, studying evidence preserved in speleothems in a coastal cave, illustrate that more than three million years ago -- a time in which the Earth was two to three degrees Celsius warmer than the pre-industrial era -- sea level was as much as 16 meters higher than the present day.

     (via sciencedaily.com) 

Well-known for its unique landscapes and rare wildlife, the Koytendag State Nature Reserve was yet to reveal the scale of its actual biodiversity when a series of international expeditions.

     (via sciencedaily.com) 

Global trends in cave waters identify how stalagmites reveal past rainfall and drought patterns.

     (via sciencedaily.com) 

Examining a 3-meter stack of bat feces has shed light on the landscape of the ancient continent of Sundaland. The research could help explain the biodiversity of present-day Borneo, Sumatra, and Java. It could also add to our understanding of how people moved through the region.

     (via sciencedaily.com) 

For the first time, a team of scholars and archaeologists has recorded and interpreted Cherokee inscriptions in Manitou Cave, Alabama. These inscriptions reveal evidence of secluded ceremonial activities at a time of crisis for the Cherokee, who were displaced from their ancestral lands and sent westward on the Trail of Tears in the 1830s.

     (via sciencedaily.com) 

By studying the last 50 years of growth of a stalagmite from Mawmluh Cave, they found an unexpected connection between winter rainfall amounts in northeast India and climatic conditions in the Pacific Ocean.

     (via sciencedaily.com) 

The discovery of a new to science species of rare and primitive arthropod in a cave that was covered by a thick ice sheet until recently is certain to raise questions. Researchers describe a new species of cave-dwelling, insect-like dipluran from the island of Vancouver (Canada) and discuss its origin.

     (via sciencedaily.com) 

Biologists have discovered three new species of groundwater salamander in Central Texas, including one living west of Austin that they say is critically endangered. They also determined that an already known salamander species near Georgetown is much more endangered than previously thought. They warn that more severe droughts caused by climate change and increasing water use in Central Texas have left groundwater salamanders 'highly vulnerable to extinction.'

     (via sciencedaily.com) 

Volcanoes are not fed by molten magma formed in large chambers finds a new study, overturning classic ideas about volcanic eruptions.

     (via sciencedaily.com) 

The fossil record of early hominins in South Africa is biased towards periods of drier climate, suggests a study of cave deposits. This finding suggests there are gaps in the fossil record, potentially obscuring evolutionary patterns and affecting our understanding of both the habitats and dietary behaviors of early hominins in this region. South Africa's highest concentration of early hominin fossils comes from the 'Cradle of Humankind' caves northwest of Johannesburg.

     (via sciencedaily.com) 

Scientists are studying a guppy-sized, blind, translucent fish that lives in the cave systems of northern Mexico to figure out why some animals can regenerate their hearts, while others just scar.