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DC announces major step in plan to clean up Anacostia River, surrounding areas

October Sky sights: Wallops launch, full moons, Mars and meteors

Scientists create ‘super enzyme’ that eats plastic bottles six times faster

Mars might have salty ponds next to underground lake, raising potential for life

Fall arrives — and so does Mars

Trump reignites climate debate in visit to fire-ravaged West Coast

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COVID-19 jeopardizes decades of work in reducing preventable childhood deaths, report finds

What should I look for in a hand sanitizer?

A ‘Corn Moon’ rises tonight — and it only happens every 3 years

Astronaut Jeanette Epps to be first Black woman to join ISS crew

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August 28

WTOP photo tour: Historic nuclear power plant at Fort Belvoir to be dismantled

Penguins originated in Australia and New Zealand — not the Antarctic, new study finds

New Jersey counties are under quarantine for another reason: Invasive bugs

Report: Pennsylvania falls behind in Chesapeake Bay cleanup

How to view the Perseids, the year’s best meteor shower

Lightshow in the sky: Perseid meteors not to be missed

NASA drops ‘insensitive’ nicknames for cosmic objects

He’s been stung 1,000 times — for science

ULA, SpaceX win massive Pentagon contracts

Woman is 1st in US to get 2nd face transplant

Exploding stars created the calcium in our bones and teeth, study says

Johns Hopkins study finds immunization programs pay off in long run

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July 31

Human sperm roll like ‘playful otters’ as they swim, study finds, contradicting centuries-old beliefs

NASA’s next Mars mission is go for launch, with a new rover — and a helicopter