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News articles about "Fossils"

Greenhouse gases linked to African rainfall

Scientists may have solved a long standing enigma known as the African Humid Period an intense increase in cumulative rainfall in parts of Africa that began after a long dry spell following the end of ... - Read More

Massive geographic change may have triggered explosion of animal life

A new analysis of geologic history may help solve the riddle of the Cambrian explosion the rapid diversification of animal life in the fossil record 530 million years ago that has puzzled scientists since the ... - Read More

Physics determined ammonite shell shape

Ammonites are a group of extinct cephalopod mollusks with ribbed spiral shells They are exceptionally diverse and well known to fossil lovers Régis Chirat researcher at the Laboratoire de Géologie de Lyon Terre Planètes et ... - Read More

Forging new ground in oil forensics: Deepwater Horizon Oil on shore even years later, after most has degraded

Years after the 2010 Deepwater Horizon Oil spill oil continues to wash ashore as oil soaked sand patties persists in salt marshes abutting the Gulf of Mexico and questions remain about how much oil has ... - Read More

Modern ocean acidification is outpacing ancient upheaval: Rate may be ten times faster

Some 56 million years ago a massive pulse of carbon dioxide into the atmosphere sent global temperatures soaring In the oceans carbonate sediments dissolved some organisms went extinct and others evolved Scientists have long suspected ... - Read More

Solving the puzzle of ice age climates: Southern Ocean and explanation for 'Last Glacial Maximum'

The paleoclimate record for the last ice age a time 21 000 years ago called the Last Glacial Maximum LGM tells of a cold Earth whose northern continents were covered by vast ice sheets Chemical ... - Read More

Richest marine reptile fossil bed along Africa's South Atlantic coast is dated at 71.5 mya

A new study uses carbon isotope dating to determine the first precise age for this bed and ties the western coast of Africa to 30 million years of global geologic records Paleontologists at Southern Methodist ... - Read More

Revealing the healing of 'dino-sores': Examining broken bones in 150-million-year-old predatory dinosaur

Scientists have used state of the art imaging techniques to examine the cracks fractures and breaks in the bones of a 150 million year old predatory dinosaur The University of Manchester researchers say their groundbreaking ... - Read More

Dust in the wind drove iron fertilization during ice age

Researchers from Princeton University and the Swiss Federal Institute of Technology in Zurich have confirmed that during the last ice age iron fertilization caused plankton to thrive in a region of the Southern Ocean The ... - Read More

Why did humans replace Neanderthals? Paleo diet didn't change, the climate did

Why were Neanderthals replaced by anatomically modern humans around 40 000 years ago One popular hypothesis states that a broader dietary spectrum of modern humans gave them a competitive advantage on Neanderthals Geochemical analyses of ... - Read More

Water cycle amplifies abrupt climate change

During the abrupt cooling at the onset of the so called Younger Dryas period 12680 years ago changes in the water cycle were the main drivers of widespread environmental change in western Europe Thus the ... - Read More

Scientists stitch up photosynthetic megacomplex

Proteins, Proteins, proteins
When sunlight strikes a photosynthesizing organism energy flashes between proteins just beneath its surface until it is trapped as separated electric charges Improbable as it may seem these tiny hits of energy eventually power the ... - Read More

Evidence of 3.5-billion-year-old bacterial ecosystems found in Australia

Ecosystems
Reconstructing the rise of life during the period of Earth's history when it first evolved is challenging Earth's oldest sedimentary rocks are not only rare but also almost always altered by hydrothermal and tectonic activity ... - Read More

Paleontologist presents origin of life theory

Earth, earth
It has baffled humans for millennia how did life begin on planet Earth Now new research from a Texas Tech University paleontologist suggests it may have rained from the skies and started in the bowels ... - Read More

Texas Tech Paleontologist Presents Origin of Life Theory

Released 10 29 2013 11 45 AM EDTSource Newsroom Texas Tech University more news from this source Oct 30 2013 It has baffled humans for millennia how did life begin on planet Earth Now new ... - Read More

Late Cretaceous Period was likely ice-free

Ice
For years scientists have thought that a continental ice sheet formed during the Late Cretaceous Period more than 90 million years ago when the climate was much warmer than it is today Now a University ... - Read More

Biochemists resurrect 'molecular fossils': Findings challenge assumptions about origins of life

Biochemists, Fossils
Before there was life on Earth there were molecules A primordial soup At some point a few specialized molecules began replicating This self replication scientists agree kick started a biochemical process that would lead to ... - Read More

Assumptions about origins of life challenged

Before there was life on Earth there were molecules A primordial soup At some point a few specialized molecules began replicating This self replication scientists agree kick started a biochemical process that would lead to ... - Read More

Nuke test radiation can fight poachers who kill elephants, rhinos, hippos

Radiation, Radiation, Radiation
University of Utah researchers developed a new weapon to fight poachers who kill elephants hippos rhinos and other wildlife By measuring radioactive carbon 14 deposited in tusks and teeth by open air nuclear bomb tests ... - Read More

Fossil kangaroo teeth reveal mosaic of Pliocene ecosystems in Queensland

The teeth of a kangaroo and other extinct marsupials reveal that southeastern Queensland 2.5 5 million years ago was a mosaic of tropical forests wetlands and grasslands and much less arid than previously thought The ... - Read More
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