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Tag: "rocks" at biology news

New Clues Add 40,000 Years to Age of Human Species

... radioactive decay. Brown and McDougall collected rocks containing volcanic debris, which McDougall dated ... produced by explosive volcanic eruptions, and the rocks were probably carried to the Lake Turkana basin soon after, providing a time stamp for nearby sedime...

Nature provides inspiration for important new adhesive

...nd wondered how they could cling so tenaciously to rocks by their thread-like tentacles. "I was amazed at ...yssus, which are small threads that attach them to rocks and other surfaces. The byssus thread is a protein with a very unusual composition - an abundant lev...

Hydrogen and methane provide raw energy for life at 'Lost City'

... to seawater and serpentinization. Even more such rocks were present on early Earth, Kelley says. "We don...isms, with which to look for life in those ancient rocks or on other planets. The work being published was funded by the NSF, NASA Astrobiology Institute an...

Evidence of 600-million-year old fungi-algae symbiosis discovered in marine fossils

...ation is not an issue and the 600-million-year-old rocks also contain many fossils of coccoidal cells that are not surrounded by filaments. "So it is a loose lichen-like association," said Xiao. "The organisms are not obliged to live together." Now there is a new question. "We know that this symbiotic rel...

Discovery of an American salamander where it shouldn't be: Korea

...ders, let's see what we can find when we turn over rocks and logs.'" To date, the salamander has been found in 16 locations in three Korean provinces, and Wake and his colleagues have established that it differs significantly from all other lungless salamanders, which make up 70 percent of the known 535 s...

Study casts doubt on 'Snowball Earth' theory

...mains of photosynthesizing microbes in prehistoric rocks suggest Earth was not ice-bound A study that appl...the drill core came from an extensive formation of rocks with similar characteristics. "At what point does an enormous refugium become open ocean?" she aske...

Virginia Tech, Nanjing Institute researchers discover half-billion year-old fossils

...have a wealth of fossils and impressions frozen in rocks that they can study from as far back as 540 millio...l-preserved fossils form from 550 million year old rocks of the Ediacaran Period. Shuhai Xiao, geoscientist from Virginia Tech, with Bing Shen, a Virginia Te...

India's smoking gun: Dino-killing eruptions

...with magnetic fields frozen in the rocks. Volcanic rocks record information about the Earth's magnetic field with magnetic minerals that align with Earth's field like millions of tiny compasses before the lava cools. When the lava solidifies, the compasses are locked in place. Lava layers that erupted wit...

Does manganese inhaled from the shower represent a public health threat?

...anganese, which is found in food and many types of rocks and enters the air, soil and water. But, at higher levels, manganese is toxic to the central nervous system and can cause learning and coordination disabilities, behavioral changes and a condition that is similar to Parkinson's disease. Children, pr...

Newly discovered birdlike dinosaur is oldest raptor ever found in South America

...like dinosaurs) have been found only in Cretaceous rocks of Asia and North America, northern continents that were part of Laurasia. (Laurasian dromaeosaurs include the famous Velociraptor from the Gobi Desert, the large Utahraptor from the American West, and the recently discovered Microraptor and Sinornit...

Science's Breakthrough of the Year: Watching evolution in action

... This year, researchers took another look at Earth rocks and meteorites that resemble the starting material of the solar system and found that their atoms were significantly different. So where did Earth get its building blocks? Some scientists now say early Earth materials come from a different part of th...

Wild Gorillas Handy with a Stick

...himps famously use sticks to fish for termites and rocks to crack nuts in the wild; orangutans use sticks to extract seeds from the spiny, sharp husk of Neesia fruits in the wild, and bonobos use various tools, including moss as sponges and leafy twigs to swat away bees.) That no one has ever observed wild...

Alleged 40,000-year-old human footprints in Mexico much, much older than thought

...esis came to Renne one morning in the shower. Many rocks retain evidence of their orientation at the moment...t the Toluquilla quarry last year while collecting rocks from another anthropological site across the reservoir. Renne noted that the black, basaltic rock is...

Carnegie Mellon scientists show brain uses optimal code for sound

... vowels (like cat vocalizations), consonants (like rocks hitting one another) and sibilants (ambient noise). To gather sounds for their research, the scientists traipsed through the woods and recorded cracking branches, crunching leaves and wind rustling through leaves before returning to the laboratory ...

Carbon cycle was already disrupted millions of years ago

Dutch researcher Yvonne van Breugel analysed rocks from seabeds millions of years old. Carbon occurs naturally in two stable forms; atomic mass 12 (99 percent) and atomic mass 13 (1 percent). Episodes in the Jurassic and Cretaceous periods were characterised by a relatively strong increase in 12C. Th...

Researchers discover way to transport environmental arsenic to plant leaves in new clean-up strategy

...ers dug open wells all over India through soil and rocks with naturally occurring arsenic. The result was widespread arsenic pollution from contaminated water. The problem is thus extremely widespread and not the result of industrial accidents or practices. ...

Inside rocks, implications for finding life on Mars

... before. If a future space mission to Mars brings rocks back to Earth, Schopf said the techniques he has u...ientists to look at microscopic fossils inside the rocks to search for signs of life, such as organic cell walls. These techniques would not destroy the rock...

Insect predation sheds light on food web recovery after the dinosaur extinction

...m early and late Paleocene and 1 from early Eocene rocks in Wyoming, Colorado, Montana and North Dakota. Insects eat leaves in many different ways, including chewing, mining, galling, and piercing and sucking; their diverse feeding marks preserve well in the rock record, often when insect body fossils are ...

UCLA scientists strengthen case for life more than 3.8 billion years ago

...a on Akilia Island in West Greenland where ancient rocks were discovered that may preserve carbon-isotope e...ter confidence than we ever had before, that these rocks are older than 3.8 billion years," said Manning, who has conducted extensive research in Greenland. ...

Far more than a meteor killed dinos

...the famous extraterrestrial iridium layer found in rocks worldwide that marks the impact that finally ended the Age of Reptiles. "The Chicxulub impact could not have caused the mass extinction," says Princeton University paleontologist Gerta Keller, "because this impact predates the mass extinction and ...

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