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Nearly a day after being downgraded from a tropical storm, Ophelia is still threatening much of the Northeast with coastal flooding, life-threatening waves and heavy rain from Washington to New York City.
Fall gets its official start this weekend in the Northern Hemisphere. This year’s autumnal equinox arrives on Saturday. But what does that mean?
Planet Earth is about to receive the biggest sample yet from an asteroid. A NASA spacecraft will fly by Earth on Sunday and drop off pebbles and dust collected from the asteroid Bennu to close out a seven-year journey.
Fewer than half of rural hospitals have labor and delivery units and the number keeps dropping. It’s forcing pregnant women to travel longer distances for care or face giving birth in an emergency room.
For a history-making two months, a pig’s kidney worked normally inside a brain-dead man. And while the dramatic experiment ended this week, it’s raising hope for eventually testing pig kidneys in living patients.
NASA says the study of UFOs will require new scientific techniques, including advanced satellites as well as a shift in how unidentified flying objects are perceived.
Preventing dengue fever has long meant teaching people to fear mosquitoes and avoid their bites. Now scientists are promoting a new way to control the disease with the help of mosquitoes.
The Federal Aviation Administration says SpaceX must take a series of steps before it can launch its mega rocket again.
A newly discovered comet is swinging through our cosmic neighborhood for the first time in more than 400 years.
A study conducted over 18 years in Costa Rica shows that small farms with natural landscape features such as shade trees, hedgerows and tracts of intact forest can provide a refuge for some tropical bird populations.
Four astronauts are back on Earth after a six-month stay at the International Space Station. Their SpaceX capsule parachuted into the Atlantic early Monday off the Florida coast.
If Shohei Ohtani has a second Tommy John surgery, it’s possible his recovery might be more difficult than the first — but not a given.
A NASA spacecraft around the moon has found the likely crash site of Russia’s lost lunar lander. The Luna 25 lander slammed into the moon last month, a harsh end to Russia’s first moon mission in almost half a century.
A rare blue supermoon — the closest full moon of the year — dazzled stargazers Wednesday night. Saturn joined the celestial spectacle, visible alongside the moon, at least where skies were clear.
A rare blue supermoon is pairing up with Saturn this week for an astronomical two-for-one. The cosmic curtain rises Wednesday night with the second full moon of the month, the reason it’s considered blue.
A recent study showed that tests for sick newborns that look at their full genetic blueprints are nearly twice as good at finding genetic problems as narrower, more commonly used tests.
Four astronauts from four countries are rocketing toward the International Space Station. It is NASA’s most multinational crew yet, representing the U.S., Denmark, Japan and Russia.
Four astronauts will have to wait an extra day to get to space. NASA and SpaceX halted the countdown late Thursday night, just hours before the planned liftoff from Florida.
Scientists say the loss of ice around Antarctica is hurting the survival of emperor penguin chicks. Emperor penguins hatch their eggs and raise their chicks on the ice that forms around the continent each winter and melts in the summer months.
A new study suggests that deep-sea “hot tubs” may help octopus eggs hatch faster. Octopus usually live solitary lives.
A sister’s choice to donate her brother’s body for research is helping doctors learn how to one day use pig organs to save human lives.
A new study shows a promising procedure to treat severe injuries in one eye by using stem cells from the other.
New research takes another look at the DNA of the famous glacier mummy to paint a better picture of the ancient hunter.
Virgin Galactic has rocketed to the edge of space with its first tourists. One passenger bought his ticket 18 years ago.
The annual Perseid meteor shower reaches its peak this weekend. The best viewing will be from Saturday night into early Sunday morning, when viewers might be able to spot a meteor per minute.
The U.S.-Canadian crew inspected the capsule during a visit to Kennedy Space Center late Monday and Tuesday. NASA plans to send the four around the moon and back late next year.
Already running years behind, Boeing’s first astronaut flight is now off until at least next March. Boeing said Monday that it should be done removing flammable tape from its Starliner capsule in the coming weeks.
NASA’s Voyager 2 spacecraft is back in contact again, after flight controllers corrected a mistake that had led to weeks of silence.
A newly studied species of ancient whale might be the heaviest animal ever found. Scientists reported Wednesday that the creature could challenge the blue whale’s title as the heaviest animal to live on Earth.
Flight controllers accidentally sent a wrong command nearly two weeks ago that tilted the spacecraft’s antenna away from Earth and severed contact.