Tag: "fossils" at biology news

Duck-billed dino crests not linked to sense of smell

... basically all four-legged animals." Evans studied fossils from a group of herbivorous dinosaurs called lambeosaurs, which are often referred to as crested duck-billed dinosaurs. Lambeosaurs are easily recognizable for their large cranial crests, which contain elongated nasal passages and loop over their sku...

Pitt professor's theory of evolution gets boost from cell research

...s in the fossil record by assuming the intervening fossils simply have not been found yet. Rather, Schwartz argues, they have not been found because they don't exist, since evolution is not necessarily gradual but often sudden, dramatic expressions of change that began on the cellular level because of radica...

Inside rocks, implications for finding life on Mars

...and colleagues have produced 3-D images of ancient fossils -- 650 million to 850 million years old -- preserv...py, could enable scientists to look at microscopic fossils inside the rocks to search for signs of life, such as organic cell walls. These techniques would not...

Finding life on Mars and outer space begins by examining Earth's inner space

...same way paleontologists explored for the earliest fossils of life on our own planet. The biggest challenge has been adapting these methods for robotic explorers to use." "Earth is the laboratory for future discoveries on Mars. Without examining Earth's extreme environments, we wouldn't understand how proc...

UC Riverside researchers identify clay as major contributor to oxygen that enabled early animal life

...tly preceded in geological time the first animal fossils about 600 million years ago. "This study shows how we can use principles developed from the study of modern environments to understand the very complex origin of life on our planet studying a time in history that has left us only a scanty record of ...

FSU biologist says new dinosaur is oldest cousin of Tyrannosaurus rex

...known as well as the most primitive tyrannosauroid fossils ever found. The discovery of the oldest tyrannosau...that area. "China has been a hot spot for dinosaur fossils since the 1990s," he said. Widely publicized research by Erickson who also is known as an expert in...

Ancient greenhouse emissionspossible lessons for modern climate

...onclusions were drawn from an examination of plant fossils from the Bighorn Basin of northwestern Wyoming. Scientists think that the fast-changing climate at the beginning of the Eocene was driven by a natural release of carbon-containing greenhouse gases analogous to what is occurring with the release of ca...

Early humans on the menu

...tralopithecus afarensis is the common link between fossils that came before and those that came after. It shares dental, cranial and skeletal traits with both. It's also a very well-represented species in the fossil record. "Australopithecus afarensis was probably quite strong, like a small ape," Sussman say...

Smallest Triceratops skull ever found provides clues to dinosaur's growth

...are slightly older than the T. rex and Triceratops fossils from the Upper Hell Creek Formation. His coauthors on the new paper are William A. Clemens, a UC Berkeley professor of integrative biology and Museum of Paleontology emeritus curator who opened up the Montana area for fossil exploration more than 30 ...

Sociality of sweat bees evolved simultaneously during climate change

...f London, Series B, Biological Sciences, used both fossils as well as more than 2,300 base pairs of DNA seque...t the various species are from each other, and the fossils allow the researchers to represent the phylogeny in terms of a timeline in millions of years. In 200...

Embryos tell story of Earth's earliest animals

...onal Academy of Sciences. Purported animal embryo fossils have been reported continuously over the last 12 y...ng in China. Scientists disagree about whether the fossils are actually animal embryos or even if they are animals. "The fossils look great. The problem is, i...

New Arctic fossils fill evolutionary gap between fish and limbed animals

...ove the Arctic Circle of remarkably well preserved fossils from a new species of ancient fish provides a key ...es announced the discovery of 375-million-year-old fossils with numerous features that place them squarely at the evolutionary transition from fish to limbed a...

Newly found species fills evolutionary gap between fish and land animals

Paleontologists have discovered fossils of a species that provides the missing evolutionar...evolved into land animals. The high quality of the fossils also allowed the team to examine the joint surfaces on many of the fin bones, concluding that the sh...

New fossils fill the evolutionary gap between fish and land animals

...ead and a flattened body. Scientists collected the fossils during four summer explorations on Ellesmere Islan... climate. The deposits that produced the Tiktaalik fossils were left by stream systems meandering across wide floodplains. "This kind of shallow stream system ...

Ancient ants arose 140-168 million years ago

...eagues used a "molecular clock" calibrated with 43 fossils distributed throughout the ant family tree to date key events in the evolution of ants, providing a well-supported estimate for the age of modern lineages. Their conclusion that modern-day ants arose 140 to 168 million years ago pushes back the origi...

Ants are surprisingly ancient, arising 140-168 million years ago

...eagues used a "molecular clock" calibrated with 43 fossils distributed throughout the ant family tree to date key events in the evolution of ants, providing a well-supported estimate for the age of modern lineages. Their conclusion that modern-day ants arose 140 to 168 million years ago pushes back the origi...

Hominid fossils from Ethiopia link ape-men to more distant human ancestors

Berkeley -- New fossils discovered in the Afar desert of eastern Ethiopia ... Los Alamos National Laboratory in New Mexico. The fossils are from the most primitive species of Australopithecus, known as Au. anamensis, and date from about...

Gigantic meat-eating dinosaur discovered

...that exceeded 12.5 meters (40 feet) in length. The fossils include the longest known fibula (shin) bone for any meat-eating dinosaur, slightly longer though less robust than that of its close cousin, Giganotosaurus. The skull of Mapusaurus is lower and lighter than that of its older sister genus, Giganotosau...

Carbon cycle was already disrupted millions of years ago

...enly come from? Van Breugel investigated chemical fossils of marine algae and land plants from sediments dep...o are recorded in organic material. These chemical fossils have been well preserved because large parts of the oceans in the Jurassic and Cretaceous periods co...

'Banana-jawed' fossil mammal linked to rare sound-producing skill

... insight, he said. Also, relatively few Thyrohyrax fossils had been found for study. Simons solved the supply problem as he collected fossils at the Fayum site, located about two hours' drive southwest of Cairo. For several decades, Simons vi...

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(Date:8/27/2014)... of fish began exploring land and evolved into tetrapods ... ancient fish used their fishy bodies and fins in a ... scientific mysteries. , Researchers at McGill University published in ... called Polypterus , to help show what might have ... water. Polypterus is an African fish that can ...
(Date:8/27/2014)... when it only requires nerve cells to rearrange existing ... to generate new patterns, a study of monkeys has ... through recordings of electrical activity of brain cell networks. ... of Health. , "We looked into the brain and ... outside the box," said Aaron Batista, Ph.D., an assistant ...
(Date:8/27/2014)... manipulating neural circuits in the brain of mice, ... memories. The research, led by Howard Hughes Medical ... of Technology (MIT), reveals that the connections between ... information about an experience and the part of ... that experience are malleable. , Altering those ...
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