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Almost 40% of people aged 65 to 80 are sexually active, but few are open about it

Older people have sex too, but they don't talk about it to their doctors, which may be a problem.

New species of sea slug steals algae chlorophyll to live a solar-powered lifestyle

Lifestyle so green it shows through its skin.

Astronomers find helium in exoplanet's atmosphere for the first time

It took abnormally look considering helium is the 2nd most abundant element in the universe.

NASA lander will study 'Marsquakes'

The quakes will help scientists learn more about Mars' interior.

Victim's jawbone shows shocking intensity of Hiroshima nuclear attack

The victim was less than a mile away from the blast's center, with devastating effects.

Gray hair linked to immune system activation in mice

This may explain why some people experience premature hair graying.

Mistletoe exhibits unique, stunning biological property

Mistletoe really is a strange one.

Fasting can help stem cells in the intestine to regenerate

They are fast to heal.

Butchered rhino bones and stone artifacts suggest hominids were in Philippines 709,000 years ago

The toolmakers and butchers belong to a mysterious species of human ancestors.

More than just relaxation: Frequent sauna bathing reduces risk of stroke

Saunas are good for your heart, science suggests.

Stephen Hawking's final paper was just published -- and it's mindblowing

Before he died, the famous physicist completed his final theory of the cosmos.

Plants use underground networks to see when their neighbors are stressed

Despite their sedentary lifestyles, plants have a lot more going on than it seems.

Eighteen U.S states are taking the EPA to court over weakening emission regulations

"We are not looking to pick a fight with the Trump administration, but we are ready for one," said California Attorney General Xavier Becerra.

Engraved Crimean flint could point to Neanderthal symbolism

Neanderthals were every bit as complex and advanced as early humans -- and perhaps even more so.

Pink river dolphins in the Amazon basin are declining rapidly

These iconic animals could become extinct soon if we dont help them.

The incredibly mobile and efficient eyes of the mantis shrimp

Their eyes can rotate in ways you wouldn't imagine.

Unique fossils show how early bird beaks developed

It's a mix of surprisingly old and surprisingly modern.

Salty, subglacial lakes in Canada could be key for studying aliens

This would allow us to gain a new understanding of extraterrestrial life.

Hawaii moves to ban common sunscreen mixes in a bid to safeguard its corals

Worry not -- alternatives are readily available, so don't cancel your vay-cay just yet.

World's largest dead zone identified in the Gulf of Oman -- it's nearly the size of Florida

"Piracy and geopolitical tensions" kept it hidden from the scientific community until now.

Science shows what's the best time to learn a foreign language

You shouldn't let this discourage you though.

Want to remember your dreams? Try taking Vitamin B6, new study suggests

A hitchhiker's guide to remembering your dreams -- and your lucid dreams.

The longest straight-line path on Earth is a 20,000-miles ocean journey

It all started with an intriguing post on Reddit.

American pikas found to tolerate global warming better than expected

Adorable and resilient.

Boaty McBoatface to lead 5-year expedition to one of the fastest-melting glaciers

It's one of the last barriers holding back a lot of water from hitting the ocean.

No evidence to say that Earth's magnetic pole is reversing, new study concludes

Magnetic poles will likely remain in place for the foreseeable future.

A genetic bed of roses: scientists sequence the complete genome of the rose

Let's stop and smell the roses... at a genetic level.

Some bacteria eat antibiotics -- and this might actually be a good thing

There's an arms race going between us and bacteria. We seem to be losing -- badly.

Climate change-induced forest fires threaten iconic conifers in western US

The Klamath is set to lose many of its iconic conifers, to be replaced by shrubs.

Just a single chocolate bar may boost memory, cognition, immunity, and mood

Chocolate -- good for the tummy, good for the brain.

Vegetarian diets could help avert one-third of early deaths, Harvard researcher states

Vegetarians, rejoice!

NASA and ESA team up to bring Martian soil back home

A great partnership for a great goal.

Egotists' brains just don't care about the future, affecting their choices in life

"Whether the consequences of our choices for ourselves and others are visible immediately or will only materialize in the future, we need to integrate them into our considerations when deciding," the paper's abstract reads.

The European Union rules: total ban on bee-harming pesticides

The ban was applauded by many, but also contested by some.

Despite their violent impacts, asteroids could still deposit water on Earth

Ever wondered where the water you drink truly comes from?

The UK royal "luxury" birth cost less than the average US birth

A story of royalty and overpriced healthcare.

Sunken Nazi U-boat discovered: why archaeologists should leave it on the seabed

An amazing rescue story.

How tooth wear sheds light on the predatory lives of dinosaurs

Not all dino teeth are made the same...

100-million-year-old fossilized larvae got a tasty meal by pretending to be a liverwort

A wolf in sheep's clothing.

Science museum finds that rare elephant bird "replica" was actually the real thing

It's one of the biggest and rarest eggs in the world, and it was mislabeled for decades.

Recently found exoplanet is so dark, it absorbs 99% of incoming light

It's like a Vantablack planet!

Flock of 14 colliding galaxies set to become the largest structure in the universe

It's quite possibly one of the most massive objects in the universe.

Australia’s “Impossible” Renewable Energy Target Exceeded

Australia is set to exceed a target the Federal Government said was impossible to reach by 2020.

Fossilized footprints show human hunters stalked giant sloths more than 11,000 years ago

An amazing and dangerous encounter between humans and an ice age species was trapped in fossilized mud.

Archaeologists find ancient horse burial on the Nile Valley

Ancient burial could tell us a lot about human-animal relationships.

Scientists demonstrate quantum entanglement with objects big enough to see

'Spooky action at a distance' is approaching the human scale.

Scientists complete most precise star map, revealing hidden details in our galaxy

An incredibly fruitful mission sheds new secrets about the Milky Way.

Arctic sea ice chock-full of microplastics, with over 12,000 particles per litre of ice

It should basically be called Arctic sea plastic by now.

These people recreated an ancient Roman beer, and here's what they learned

Spoiler alert: it was pretty good.

Wood-carved idol retrieved from Russian bog is, incredibly, older than the Pyramids

Not something you get to see every day.