They’re multiplying: Second ‘black hole’ found in Siberia

(Photo: AP)

It appears that gaping hole discovered deep in Siberia isn’t the only one: Locals have encountered a second crater, smaller but otherwise almost exactly like the first. 

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(Source: NBCNews.com)

Could we find aliens in 20 years? That’s debatable

(Photo: Anonymous / Jet Propulsion Lab via AP, file)

A prominent NASA scientist claims that we will find signs of alien life within 20 years. Others disagree, but say we should keep looking anyway.

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(Source: NBCNews.com)

30 Seconds To Know: Can animals be gay?

(Photo: Mark Blinch / Reuters)

A homosexual penguin couple from New York’s Central Park Zoo are back in the news now that a book about their relationship has been banned in Singapore.

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(Source: NBCNews.com)

Reality Bites: Why you can’t always blame sharks for attacking

(Photo: Kike Calvo / AP file)

Researchers are finding out that some of the common conceptions about the interactions between sharks and humans are just plain wrong.

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(Source: NBCNews.com)

'Polar vortex' flashback? Weather experts say rare summer cold front on the way

(Photo: NWS Chicago)

Remember last winter’s cold spot, which turned “polar vortex” into a phrase that sent chills through the spines of Americans east of the Mississippi River? Get ready for a flashback. 

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(Source: NBCNews.com)

Cyborgs Among Us: Human ‘biohackers’ embed metals in body

(Photo courtesy of Dangerous Things)

Biohacking is a niche community at the literal bleeding edge of body modification, where man and machine become one.

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(Source: NBCNews.com)

'Cured' HIV baby is infected again, doctors find

(Source: NBCNews.com)

Nerdwatch: How one doc is regrowing teeth

(GIF: Sarah Coffey / NBC News)

Working with a team of researchers at the Harvard Wyss Institute, Doctor Praveen Arany has found a way to coax stem cells into the production of dentin, a material that forms the backbone of teeth.

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(Source: NBCNews.com)

Debunked: Five lightning myths that could kill you

(Photo: Getty Images file)

When it comes to staying safe from lightning strikes, everything you think you know is probably wrong.

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(Source: NBCNews.com)

CDC: 75 scientists possibly exposed to anthrax

(Photo: CDC)

The CDC said 75 government scientists may have been exposed to live anthrax.

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(Source: NBCNews.com)

You’ve Got Smell: First ‘scent messages’ delivered

(Photo: Vapor Communications)

The first transatlantic “scent messages” were exchanged on Tuesday between New York City and Paris, and they smelled like champagne and macaroons.

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(Source: NBCNews.com)

Scientists find beautiful new species in Southeast Asia

(Photo: Jodi J L Rowley / Australian Museum via Wwf / AP)

Conservationists document hundreds of new species in Southeast Asia’s Mekong Delta, including beautiful creatures from Myanmar.

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(Source: NBCNews.com)

Are hurricanes with female names really deadlier?

(Photo: NOAA via Reuters)

Researchers find that hurricanes with female names are more lethal than the ones named after males — but the reason for that is partly cloudy.

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(Source: NBCNews.com)

Obama geeks out (again) at White House Science Fair

(Photo: Jim Watson / AFP - Getty Images)

Science education went to the head of the class at the White House on Tuesday, with President Barack Obama announcing a $35 million competition for teacher training programs — and checking out an all-star lineup of science fair projects.

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(Source: NBCNews.com)

Will the stars align? What to know about tonight’s meteor shower

(Photo: Ali Jarekji / Reuters file)

Will a new meteor shower known as the Camelopardalids sizzle or fizzle?

Find out how to make the most of the Saturday morning’s celestial cliffhanger.

(Source: NBCNews.com)