Sid Perkins

Sid Perkins is a freelance science writer based in Crossville, Tenn.

All Stories by Sid Perkins

  1. Earth

    The Salt Flat That Isn’t Flat: World’s largest playa sports ridges, valleys

    An innovative field survey of the world's largest salt flat, a New Jersey–size playa high in the Andes, reveals that the barren expanse actually has minuscule, centimeter-scale variations in topography.

  2. Humans

    Divorce is not ecofriendly

    Divorce often takes a devastating toll on families, but it has significant impacts on the environment as well.

  3. Earth

    Falling Behind: North American terrain absorbs carbon dioxide too slowly

    North America's vegetation soaks up millions of tons of carbon dioxide from the atmosphere each year, an impressive rate of sequestration that still can't keep up with the prodigious emissions of the planet-warming gas generated by human activity on the continent.

  4. Paleontology

    Huge, yet not quite life-size

    The Carnegie Museum of Natural History in Pittsburgh will unveil the world's largest dinosaur mural on Nov. 21, when its dinosaur halls reopen after a 30-month, $36 million renovation.

  5. Earth

    New climate sensor: Swiss grapes

    Records of grape harvests reveal the summer climate in parts of Switzerland as far back as the 1400s.

  6. Paleontology

    Back from the Dead?

    The long-term disappearance of creatures from the fossil record and their later reemergence can provide insights into ancient environmental conditions and the trustworthiness of the fossil record itself.

  7. Earth

    Yellowstone Rising: Magma floods into chamber beneath park

    Some parts of the terrain in Yellowstone National Park have been rising as much as 7 centimeters per year as molten rock wells up beneath the park.

  8. Earth

    Groundwater use adds CO2 to the air

    Pumping out groundwater for crop irrigation or industrial purposes releases planet-warming carbon dioxide into the atmosphere.

  9. Planetary Science

    Chilled Out? Ice could lurk beneath Martian equator

    An immense volume of ice-rich material may underlie a formation that extends about one-quarter of the way around Mars' equator.

  10. Paleontology

    Meet the old wolves, same as the new wolves

    The dire wolf, an extinct species preserved in abundance at the La Brea tar pits, seems to have had a social structure similar to that of its modern-day relatives.

  11. Paleontology

    Dinosaurs matured sexually while still growing

    Distinctive bone tissue in fossils of several dinosaur species suggests that the ancient reptiles became sexually mature long before they gained adult size.

  12. Paleontology

    Deinonychus’ claws were hookers, not rippers

    The meat-eating dinosaur Deinonychus probably used the large, sicklelike claw on its foot to grip and climb large prey, not disembowel it.

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