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      Life on Earth evolved from a universal common ancestor approximately 3.8 billion years ago...

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Thu06222017

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Evolution

Ethiopians and Tibetans thrive in thin air using similar physiology, but different genes

Dec. 6, 2012 — Scientists say they have pinpointed genetic changes that allow some Ethiopians to live and work more than a mile and a half above sea level without getting altitude sickness. The specific genes differ from those reported previously for high-altitude Tibetans, even though both groups cope with low-oxygen in similar physiological ways, the researchers report.

If confirmed, the results may help scientists understand why some people are more vulnerable to low blood oxygen levels caused by factors other than altitude -- such as asthma, sleep apnea, heart problems or anemia -- and point to new ways to treat them, the researchers say.

Living with less

Lower air pressure at high altitude means fewer oxygen...

Emergence of flowering plants: New light shed on Darwin's 'abominable mystery'

This figure shows the shift from ferns (blue), conifers (red) and other gymnosperms (orange) to angiosperms (green) in various aquatic environments between 130 million and 84 million years ago. (Credit: Image courtesy of Indiana University)

 Research by Indiana University paleobotanist David L. Dilcher and colleagues in Europe sheds new light on what Charles Darwin famously called "an abominable mystery": the apparently sudden appearance and rapid spread of flowering plants in the...

Scientists find oldest dinosaur -- or closest relative yet

Artist rendering of Nyasasaurus parringtoni, either the earliest dinosaur or the closest dinosaur relative yet discovered. Nyasasaurus parringtoni was up to 10 feet long, weighed perhaps 135 pounds and is depicted near plant-eating reptiles of the genus Stenaulorhynchus. (Credit: © Natural History Museum, London/Mark Witton)

1000pa (Dec. 4, 2012) — Researchers have discovered what may be the earliest dinosaur, a creature the size of a Labrador retriever, but...

Origin of intelligence and mental illness linked to ancient genetic accident

Scientists have discovered for the first time how humans -- and other mammals -- have evolved to have intelligence. (Credit: © James Steidl / Fotolia)

1000pa (Dec. 2, 2012) — Scientists have discovered for the first time how humans -- and other mammals -- have evolved to have intelligence.

Researchers have identified the moment in history when the genes that enabled us to think and reason evolved.

This point 500 million years ago provided our...

Researcher tests powerful new tool to advance ecology, conservation

1000pa (Nov. 28, 2012) — A new University of Florida study shows ecologists may have been missing crucial information from animal bones for more than 150 years.

The study featured on the cover of the November issue of Ecology shows animal bone remains provide high-quality geographical data across an extensive time frame. The research may be used to identify regions of habitat for the conservation of threatened species.

Charles Darwin first noted the importance of studying...

Human genetic variation recent, varies among populations

Nearly three-quarters of mutations in genes that code for proteins -- the workhorses of the cell -- occurred within the past 5,000 to 10,000 years, fairly recently in evolutionary terms. (Credit: © Alx / Fotolia)

1000pa (Nov. 28, 2012) — Nearly three-quarters of mutations in genes that code for proteins -- the workhorses of the cell -- occurred within the past 5,000 to 10,000 years, fairly recently in evolutionary terms, said a national consortium of genomic and...

For some feathered dinosaurs, bigger not always better

This scale illustration shows size of feathered theropod herbivores compared to humans. (Credit: Lindsay Zanno, NC State and NC Museum of Natural Sciences)

1000pa (Nov. 27, 2012) — Every kid knows that giant carnivores like Tyrannosaurus rex dominated the Cretaceous period, but they weren't the only big guys in town. Giant plant-eating theropods -- close relatives of both T. rex and today's birds -- also lived and thrived alongside their meat-eating cousins. Now...

First Bird

First Bird
What was the earliest known bird?

Unexplained artifacts

unexplained artifacts
The 10 most amazing unexplained artifacts

Evolution

Timeline: Human Evolution

Biggest Dinosaurs

The 10 Biggest Dinosaurs

Fossils 

Fossil Formation: How Do Fossils Form?
 

Book review

Dinosaurs Encyclopedia

Book Review

Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages ... WRITTEN BY A PROFESSIONAL paleontologist specifically for young readers, this guide to the Dinosauria is packed...