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Science Now Discoveries from the world of science and medicine
Martian gully theory doesn't hold water, study finds

In spite of the flowing gouges they leave behind, gullies on the Red Planet may not have been formed by liquid water, according to data from NASA’s Mars Reconnaissance Orbiter.

The findings, described in Geophysical Research Letters, showcase the complexity of Martian geology and highlight how some features on Mars are formed in ways that are unlike anything on Earth.

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'Zika is now here': Mosquitoes are spreading virus in U.S.

Zika-carrying mosquitoes are for the first time believed to be spreading the virus within the continental United States, federal disease-control officials said Friday, citing the infections of four people who were apparently bitten in the same Miami neighborhood.

More than 1,650 Zika infections have been reported on the U.S.

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Deep space travel might blow your mind, but it could be bad for your heart

Bad news would-be astronauts: Traveling into deep space could be bad for your heart.

In a study published Thursday in Scientific Reports, researchers found that astronauts who went to the moon were almost five times more likely to die of cardiovascular disease than astronauts who remained in low-Earth orbit on the International Space Station.

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Scientists find only one true wolf species in North America

How many species of wolves live in America? A new study suggests there is just one.

The new work, published Wednesday in Science Advances, finds that the gray wolf is the one true wolf in the United States. The red wolf, which lives in the Southern U.S., and the eastern wolf, now found primarily in central Ontario, are in fact coyote and gray wolf hybrids, the authors say.

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Why is Jupiter extra-hot over the Great Red Spot? Scientists puzzle over superstorm

Scientists scanning Jupiter’s atmosphere have found a mysterious spike in temperature high above the Great Red Spot — that massive, swirling storm that has graced the planet’s face for centuries.

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Remember the Ice Bucket Challenge? It helped fund discovery of ALS-related gene

The ALS Assn. is crediting money raised through the Ice Bucket Challenge for the discovery of a gene's connection to the progressive disease.

Those who accepted the challenge allowed buckets of ice water to be dumped on their heads to raise awareness and money for ALS.

The challenge became a viral sensation in 2014 and raised $115 million for the association. Figures from the ALS Assn.

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