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Air purifier vs essential oil diffuser: What's the difference?

Air purifier vs essential oil diffuser: the lowdown on each one.

Cavers discover snakes and waterfalls inside Yemen's infamous 'Well of Hell' in world-first descent

Cave explorers from Oman have become the first people to fully explore the infamous 'Well of Hell' sinkhole in Yemen.

Is insomnia a sign of pregnancy?

Is insomnia a sign of pregnancy? We asked the experts for their advice.

What is the Air Quality Index?

What is the air quality index and how can you measure it at home? We’ve got all the information you need.

Even mild COVID-19 can shrink the brain, preliminary research finds

Reduced brain volume in people who have experienced COVID-19 resembles brain changes typically seen in older adults. The implications of these findings are not yet clear.

Scientists behind tech in mRNA vaccines snag 2nd prestigious prize — is a Nobel next?

The scientists recently won one of this year's $3 million Breakthrough Prizes, as well.

'Grandma' killer whale missing from pod, feared dead

One of the Southern Resident orcas, a 47-year-old female known as L47, hasn't been seen by census takers since February.

Ritualistic artifacts found at 'Temple of the Pharaohs' in Egypt

Archaeologists excavating a temple at the ancient city of Buto, about 59 miles (95 kilometers) east of Alexandria, in Egypt, have found 2,700-year-old tools and sculptures that were used in rituals for Hathor, the goddess of the sky.

La Palma volcano eruption's infernal beauty visible from space (Photos)

New astronaut and satellite images of an active volcano on the island of La Palma reveal the frightening beauty of the eruption, as well as its dangerous proximity to humans.

Are air purifiers safe for pets?

Air quality affects our furry friends as well as us but are air purifiers safe for pets?

Peloton vs Echelon: Which exercise bike is better?

Peloton vs Echelon: everything you need to know in order to pick the right exercise bike for your home.

Sick building syndrome: what to look out for

Discover the causes of sick building syndrome and how to manage it.

How to run faster

We dig into the science around how to run faster so you can get the most from your runs.

Earliest conclusive evidence found of humans in the New World

Fossilized human footprints found in New Mexico reveal that people dwelled in the Americas during the last ice age's peak — conclusive proof of early migration to the New World.

What to eat before a run

Choosing what to eat before a run can confuse even the biggest fitness fan. Experts reveal what you need to fuel up on to get the most from your run.

Astronomers discover enormous 'cavity' in the Milky Way being masked by a cosmic illusion

Astronomers discover that two large clouds of gas in the Taurus and Perseus constellations are separated by a 500 light-year-long 'cavity', thanks to an ancient supernova.

Astrophotographers capture stunning views of the night sky (Photos)

Here's a look at stunning astronomy images from the Royal Observatory Greenwich's Astronomy Photographer of the Year competition.

Solar eclipse looks otherworldly in 'Golden Ring' astrophotography shot

The winning photographs for the 13th annual Astronomy Photographer of the Year awards have been announced, and the sun is the star of the show.

Strange mathematical term changes our entire view of black holes

The behemoths exert a pressure on their surroundings, new research has found.

US to return 'priceless' 3,500-year-old Epic of Gilgamesh tablet to Iraq 20 years after it was stolen

Discovered in 1853, the Epic of Gilgamesh caused a sensation through its telling of an ark that survived a great flood.

The Taliban may be hunting for Afghanistan's most famous treasure

With the Taliban takeover of Afghanistan, the country's archaeological remains face a grim future even if the extremist Islamic group decides not to loot or intentionally destroy them.

How to run for longer without getting tired: increase stamina and mental resilience

Knowing how to run for longer is one of the Holy Grails of fitness, so we've looked at the techniques people use to reduce fatigue and increase motivation

What does exercise do to your brain?

Exercise can tone and improve most parts of your body, but what does exercise do to your brain? And does it help your mental capabilities?

World's oldest identical twins are 107 years (and 300 days) old

Guinness World Records certified the title this month.

Some dinosaurs may have wagged their tails to help them run

Small-armed, two-legged dinosaurs may have wagged their tails to help them run, for the same reason humans swing their arms, according to a new study.

Mountain goat kills grizzly bear by stabbing it with razor-sharp horns

Parks Canada officials have confirmed that a female grizzly bear found dead in Yoho National Park was killed in self-defense by a mountain goat, that managed to stab the predator with its razor-sharp horns.

These vegetarian ants have steak knives for teeth, new study finds

Zinc and manganese atoms keep tiny arthropods' natural tools sharper for longer.

Leafcutter ants back up their bite with metal

Zinc and manganese atoms keep tiny arthropods' natural tools sharper for longer.

NASA unveils landing site on the moon for ice-hunting VIPER rover

The ice-hunting Volatiles Investigating Polar Exploration Rover (VIPER) will land just west of Nobile Crater, which sits near the moon's south pole, NASA officials announced Tuesday (Sept. 20).

Ceramic jars full of emeralds found in temple tied to El Dorado, a mythical city of gold

Archaeologists in Colombia have found eight ceramic jars, with metallic figurines and emeralds inside, within a temple and its adjacent graves.

Mouth bacteria may explain why some kids hate broccoli

Bacteria-made enzymes in spit may make cruciferous veggies taste worse to some children.

Mars was doomed to desiccation

Mars was doomed to desiccation by its small size, a new study suggests.

Asteroid three times the size of the Statue of Liberty will zoom past Earth on fall equinox

An asteroid measuring about three times the size of the Statue of Liberty will sail harmlessly by Earth on Sept. 22, the 2021 fall equinox.

Are exercise bikes good for weight loss?

They're a popular feature of many gyms, and can help with overall fitness, but are exercise bikes good for losing weight?

Treasure hunter finds gold hoard buried by Iron Age chieftain

A Danish man with a metal detector found a sixth-century hoard buried by a chieftain.

Levoit H132 review

The Levoit H132 is a compact and affordable air purifier that performs well in small to medium-sized rooms.

Scientists finally have an explanation for the most energetic explosions in the universe

Mysterious 'empty sky' gamma-ray bursts could be the work of distant supernova explosions, a new model suggests.

COVID-19 has now killed as many people in the U.S. as the 1918 Spanish flu

The 1918-1919 flu pandemic led to approximately 675,000 deaths in the U.S.

Dozens of endangered penguins killed after being stung in the eyes by swarming honeybees

Conservationists have confirmed that 64 African penguins were killed in South Africa after being stung in and around the eyes by honeybees.
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