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This composite of microscope images shows fossil animal embryos - discovered in China - that have opened a window on an early and poorly understood stage in the evolution of animals, February 1998 (file photo)
Photo: AP

600-Million-Year-Old Microscopic Fossils Upend Evolution Theory

Discovery of amoeba-like micro-organisms makes scientists rethink common theories about how complex life first evolved

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June Chappel’s home in Washington, Pennsylvania, is surrounded by gas drilling: a waste containment pond behind her and gas tanks to the side.

Rush to Extract Natural Gas Stirs Health Concerns

Pennsylvania's Marcellus Shale Reservoir holds largest US supply

An artist's conception illustrates Kepler-20e. Image credit: NASA/Ames/JPL-Caltech

First Earth-Sized Planets Spotted in Remote Constellation

Newly discovered planets are orbiting around a parent star similar to our Sun

This infrared image from NASA's Spitzer Space Telescope shows the Helix nebula, with a white dwarf visible as a tiny white dot in the center of the picture.

Astrophysicists: White Dwarf at Center of 1-A Supernova Mystery

Astronomers say it has led to unraveling of several decades-old questions about colossal, intensely bright stellar explosions

Fermilab Scientists Optimistic About Finding Higgs Boson Particle

Scientists at CERN in Geneva say they are encouraged by new data in the search for so-called "God Particle"

Mazyar Kazerooni

High School Dropout Hits It Big on the Internet

Mazyar Kazerooni started his first Internet company while he was still in high school

Hubble space telescope image, Sept. 2009 (file photo).

Hubble Captures Rebellious Star Behavior

Earth-orbiting telescope spots a young star causing havoc with its parent nebula

Smoke bellows out of chimney stacks at BlueScope Steel's steelworks at Port Kembla, south of Sydney, Australia, (File)

Australia Claims Carbon Storage Breakthrough

Scientists working on the carbon sponge project say they can now prove that this type of carbon sequestration can work safely

LHC (large hadron collider) in its tunnel at CERN

Physicists May Have Detected Elusive Higgs Boson Particle

Scientists at Large Hadron Collider say they have seen tantalizing hints of existence of Higgs boson subatomic particle

NASA: Earth's Prehistoric Record Warns of Nearing Rapid Climate Change

New US space agency study warns this century could see catastrophic impact if man-made global warming levels exceed ‘safe limit’

Students pose with the complete reconstruction of the neck vertebra of an Alamosaurus.

Paleontologists Find Biggest Dinosaur in North America

Fossils from an Alamosaurus indicate the animal was one of the biggest animal to ever live

Thousands march in Istanbul to protest Internet filtering plan by Turkish government, May 2011 (file photo).

Clinton to High-Tech Firms: Don't Aid Web Repression

Secretary of state urges software companies, high-tech firms to deny repressive governments tools that restrict Internet freedom

This image provided by NASA shows a fragment along the rim of Endeavour Crater where the Mars rover Opportunity has been exploring since August.

NASA Rover Finds New Evidence Water Once Flowed on Mars

Uncovered mineral deposits on Red Planet appear to have come from flowing water

This artist's conception illustrates Kepler-22b, a planet known to comfortably circle in the habitable zone of a sun-like star.

Space Telescope Spots 'Earth-Like' Planet 600 Light Years Away

NASA’s Kepler space telescope confirms super-Earth is 2.4 times size of Earth and has 22-degree Celsius surface temperatures

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