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Friday, Jul 29th

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Big discovery about Vikings just came from space

Vikings in North AmericaA "high-tech Indiana Jones" may have just done what no one else has been able to for 55 years: find a second Viking settlement in North America, the Washington Post reports. "Typically in archaeology, you only ever get to write a footnote in the history books, but what we seem to have at Point Rosee may be the beginning of an entirely new chapter," archaeologist Sara Parcak tells the BBC.

Parcak used images taken by satellites 400 miles above the Earth to find what appeared to be evidence that Vikings made it hundreds of miles further into North America than previously known. Parcak has used the same technique to find 17 pyramids, 1,000 tombs, and 3,000 forgotten settlements. But this newest discovery could change everything we know about Vikings in North America.

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New 250 million-year-old reptile species found in Brazil

Mew reptile found in BrazilPaleontologists have unearthed the fossilized remains of a reptile that lived 250 million years ago in what's now the Brazilian state of Rio Grande do Sul.

Researchers named the new species Teyujagua paradoxa and described it in a new paper, published this week in the journal Scientific Reports.

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Yearlong spaceman back home in Houston with family, pool

Scott KelleyNASA space champ Scott Kelly is finally back home in Houston with his family and the swimming pool that he craved throughout his yearlong absence from Planet Earth.

Before he could go home to his own bed Thursday, Kelly had to endure more medical tests to measure his body's adaptation to gravity.

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Debate rages in courts over 'high-sensitivity' DNA analysis

Debate over instant DNA testOne New York judge ruled the DNA evidence was scientifically sound. Another, just miles away, tossed it out as unreliable.

The same scenario is playing out in courthouses around the world amid a debate over whether a type of DNA analysis involving the amplification of tiny amounts of genetic material is reliable enough to convict someone for a crime.

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Telescope used on Armstrong's moon landing finds new galaxies

New galaxies foundAn Australian telescope used to broadcast live vision of man's first steps on the moon in 1969 has found hundreds of new galaxies hidden behind the Milky Way by using an innovative receiver that measures radio waves.

Scientists at the Parkes telescope, 355 km (220 miles) west of Sydney, said they had detected 883 galaxies, a third of which had never been seen before. The findings were reported in the latest issue of Astronomical Journal under the title 'The Parkes HI Zone of Avoidance Survey'.

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Scientists revive 'water bears' that were frozen for 30 years

tardigrades frozen for thiry years and revivedMicroscopic tardigrades, or "water bears," have successfully reproduced after emerging from 30 years frozen in an Antarctic moss sample.

The tiny creatures' revival after three decades in frozen moss is a new record, and the resumption of reproductive abilities is a first.

Researchers in Japan say the findings will offer new insights into tardigrades' cryptobiosis abilities -- the species' ability to temporarily shut down metabolic activity in response to external changes, like cold temperatures.

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Einstein a-go-go! Scientists rejoice as gravitational waves detected

Gravitational wave detectedIn a landmark discorvery, ripples in space and time first hypothesized by physicist Albert Einstein a century ago have been detected, with scientists suggesting that the observation of these gravitational waves could now open a new window for studying the cosmos.

The researchers said they detected gravitational waves coming from two black holes —extraordinarily dense objects whose existence also was foreseen by Einstein — that orbited one another, spiraled inward and smashed together. They said the waves were the product of a collision between two black holes 30 times as massive as the Sun, located 1.3 billion light years from Earth.

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