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Evolution

  • 27 Aug 1997

    ARNHEM, THE NETHERLANDS--Natural selection can reshape the mammalian brain as well as change its size, a researcher announced here this week at the biennial meeting of the European Society for Evolutionary Biology.

  • 26 Aug 1997

    CHAFFEY'S LOCKS, ONTARIO--Since ancient fossils are scarce, scientists trying to understand the early evolution of life turn to single-celled organisms that appear very primitive.

  • 3 Jul 1997

    Ernst Mayr, a German-born biologist known for his insights into evolution, will celebrate his 93rd birthday on Saturday. In the early part of his career, Mayr studied birds in New Guinea.

  • 6 Jun 1997

    EAST MALVERN, AUSTRALIA--Battling cold, disorientation, and claustrophobic conditions, underwater cavers have located what may be the missing link between two major caves in the spectacular Jenolan Caves system, beneath the Blue Mountains west of Sydney.

  • 29 May 1997

    Spanish researchers have discovered 800,000-year-old fossils which they believe are a new species of early humans directly ancestral to us.

  • 16 May 1997

    The skull of what may be the biggest meat-eating dinosaur ever found confirms that the southern continents were once a single huge stomping ground for dinosaurs.

  • 15 May 1997

    Forty-four years ago today, American chemist Stanley Miller gave a jolt to the debate on the origins of life with the publication in Science of his famous paper, "A Production of Amino Acids Under Possible Primitive Earth Conditions." Miller tested the hypothesis that life's chemical build

  • 30 Apr 1997

    The family tree of life may have just grown another branch. Red algae, mostly tropical seaweeds, look different from green algae and plants, but biologists believed that the appearance was misleading.

  • 30 Apr 1997

    Doomed to die on unfamiliar islands, small populations of lizards have defied the experts and adapted to their new homes by undergoing the kind of body changes that could in time transform each island's population into a separate species.

  • 25 Apr 1997

    If there is one theme uniting life-forms from the lowliest virus to the loftiest primate, it's that they all evolve. Now some lifeless strands of RNA are doing the same thing in a California laboratory.

  • 17 Apr 1997

    Scientists have unearthed a fossil of a primitive snake with stubby legs. The 95-million-year-old specimen, described in today's issue of Nature, may be the long-sought missing link between snakes and their lizard ancestors.

  • 17 Apr 1997

    From a chaotic prehistoric world teaming with 30 different kinds of apes, a single lineage survived to give rise to modern apes and humans. Now, thanks to new fossil finds, two African primates are claiming prime ancestral spots on the ape family tree.

  • 28 Mar 1997

    Although natural selection is often viewed as a slow pruning process, a dramatic new field study suggests it can sometimes shape a population as fast as a chain saw can rip through a sapling.

  • 6 Mar 1997

    The oldest known flying vertebrate glided on a bizarre pair of wings, according to a study of exquisitely preserved fossils published in tomorrow's issue of Science.* All other known flying animals, such as gliding lizards and birds and bats, have wings adapted from rib

  • 28 Feb 1997

    Paleontologists searching for an explanation for why modern mammals suddenly appeared in North America 55 million years ago had never thought to probe the deep sea.

  • 27 Feb 1997

    While the story of Homo sapiens begins about 2.5 million years ago in sunny Africa, there has been no evidence that early humans ventured into bitter subarctic regions, such as northern Siberia, until at most 30,000 years ago.

  • 12 Feb 1997

    Charles Robert Darwin, the father of evolution and modern genetics, was born on this day in 1809. In 1831, Darwin left for an epic 5-year voyage on the HMS Beagle to South America and the Gal‡pagos Islands, where he began to formulate his theory of evolution.

  • 12 Feb 1997

    Scientists have never known just what to make of flying insects. The fossil record shows that they arose on the scene some 500 million years ago, but just how insects managed to evolve wings has remained a mystery.

  • 8 Jan 1997

    Shortly after Charles Darwin returned to England from his famous Beagle voyage to the Gal‡pagos and other islands in the southern oceans, he holed up as a virtual recluse for the rest of his life. What was wrong with him?

  • 12 Dec 1996

    The thought of another human species coexisting with our own seems rather, well, alien. But this may have been the case a mere 27,000 to 53,000 years ago.

  • 11 Dec 1996

    The discovery in Canada of three arthropod fossils has pushed back the dates of the first fully terrestrial animals in North America by tens of millions of years.

  • Mary D. Leakey, the distinguished archaeologist and matriarch of the famous Leakey clan of scientists, died last night in Nairobi, Kenya. She was 84. Leakey made numerous major discoveries--of both stones and bones--that shaped the study of African prehistory and human evolution.

  • 31 Oct 1996

    Three months after a U.S. team announced that they had found hints of ancient life on Mars, a group of British scientists has seconded the claim. The original hints consisted of carbon compounds, minerals, and tiny fossil-like structures in a meteorite that came from the Red Planet.

  • 24 Oct 1996

    Animals appeared on Earth more than a billion years ago--twice as early as previously estimated, according to a provocative study published in the 25 October issue of Science.

  • 23 Oct 1996

    Mineral formations cited as remnants of a living organism on a martian meteorite may have been forged at temperatures too hot for known life-forms, according to an analysis presented today at the American Astronomical Society's Division for Planetary Sciences meeting in Tucson, Arizona.

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