Tag: Science (Journal)

Matter: Crossing From Asia, the First Americans Rushed Into the Unknown

Nearly 11,000 years ago, a man died in what is now Nevada. Wrapped in a rabbit-skin blanket and reed mats, he was buried in a place called Spirit Cave. Now scientists have recovered and analyzed his DNA, along with that of 70 other ancient people whose remains were discovered throughout the Americas. The findings lend […]

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Matter: How to Turbocharge Flu Protection (Llamas Required)

The oncoming flu season has claimed its first lives, among them a child in Florida who had not gotten a flu shot. This year’s vaccine significantly reduces the odds of getting sick — and you should get one now if you haven’t already — but it’s far from perfect. For one thing, its effectiveness fluctuates […]

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Trilobites: Where Did Fish First Evolve? The Answer May Be Shallow

More than 400 million years ago, ancient oceans were teeming with many fish that might seem alien in today’s seas. Back then some wore plates of bony armor and lacked jaws, like the arandaspids, which looked like a clam with a tail. The heterostracans sometimes resembled underwater armadillos with spikes. There were also galeaspids, some […]

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Matter: Researchers Explore a Cancer Paradox

Cancer is a disease of mutations. Tumor cells are riddled with genetic mutations not found in healthy cells. Scientists estimate that it takes five to 10 key mutations for a healthy cell to become cancerous. Some of these mutations can be caused by assaults from the environment, such as ultraviolet rays and cigarette smoke. Others […]

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Most White Americans’ DNA Can Be Identified Through Genealogy Databases

The genetic genealogy industry is booming. In recent years, more than 15 million people have offered up their DNA — a cheek swab, some saliva in a test-tube — to services such as 23andMe and Ancestry.com in pursuit of answers about their heritage. In exchange for a genetic fingerprint, individuals may find a birth parent, […]

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Trilobites: Hidden Kingdoms of the Ancient Maya Revealed in a 3-D Laser Map

Hidden pyramids and massive fortresses in the jungle. Farms and canals scattered across swamplands. Highways traversing thickets of rain forest. These are among more than 61,000 ancient Mayan structures swallowed by overgrowth in the tropical lowlands of Guatemala that archaeologists have finally uncovered using a laser mapping technology called lidar. The discoveries, published Thursday in […]

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Trilobites: Killer Whales Face Dire PCBs Threat

Most people thought the problem of polychlorinated biphenyls — known as PCBs — had been solved. Some countries began banning the toxic chemicals in the 1970s and 1980s, and worldwide production was ended with the 2001 Stockholm Convention. But a new study based on modeling shows that they’re lingering in the blubber of killer whales […]

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Trilobites: Watch Plants Light Up When They Get Attacked

Plants have no eyes, no ears, no mouth and no hands. They do not have a brain or a nervous system. Muscles? Forget them. They’re stuck where they started, soaking up the sun and sucking up nutrients from the soil. And yet, when something comes around to eat them, they sense it. And they fight […]

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Settling Arguments About Hydrogen With 168 Giant Lasers

With gentle pulses from gigantic lasers, scientists at Lawrence Livermore National Laboratory in California transformed hydrogen into droplets of shiny liquid metal. Their research, reported on Thursday in the journal Science, could improve understanding of giant gas planets like Jupiter and Saturn whose interiors are believed to be awash with liquid metallic hydrogen. The findings […]

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