NATURE

Look closely at a sunflower, and you'll see the distinct spiral in its center.

6 Fascinating Places to See the Fibonacci Sequence

Fibonacci developed his theory based on rabbit population growth, but you'll find the golden ratio in everything from flowers to outer space.

11 Illuminating Facts About Fireflies

No summer evening is complete without watching fireflies. Here are some fun facts about lightning bugs—which are technically beetles, not bugs.

The Reason You Sometimes See Chunks of Trees on Power Lines

Unlike the brightly colored balls on power lines, those random "tree chunks" don't serve a practical purpose.

10 Amazing Places to See Fireflies

Seeing a bunch of lightning bugs illuminate a dark sky is a spellbinding experience.

Dolphin urine is a sign of true friendship.

Dolphins Taste Each Other's Pee to Identify Friends

Dolphins don't just use vocalization to find pals: They also take urine samples.

Why You See Fewer Fireflies in the Summer Than You Used To

It's not in your head—there really are fewer fireflies than there used to be. Luckily there are steps you can take to help the insects.

A window strike can really ruin a bird's day—or even end their life.

8 Ways to Prevent Birds From Crashing Into Your Windows

Nothing ruins the joy of watching backyard wildlife like the sudden thunk of a bird smashing into your window.

These family-friendly camping destinations can help you make the most of the summer.

10 Best States for Your Next Family Camping Trip

These states offer something for camping enthusiasts of all ages.

Meet the Rusty Spotted Cat—the World’s Smallest Feline

Weighing just two to four pounds, the rusty spotted cat is the smallest wild cat on Earth.

Luxembourg Palace and Gardens in Paris, France.

The 20 Most Photogenic City Parks in the World

From Central Park to Luxembourg Gardens, these are the most-Instagrammed parks in cities around the world.

10 Easy-to-Grow Plants for First-Time Gardeners

You won't need a green thumb to take care of these tough plants.

Don't bet on finding one of these on St. Patrick's Day

Here Are Your Chances of Finding a Four-Leaf Clover This St. Patrick's Day

Your chances of finding a four-leaf clover are one in thousands, but there are some steps you can take to increase your luck.

Pheromone Traps Could Eradicate Murder Hornets With the Lure of Sex

A new study is proposing an innovative way to eradicate invasive murder hornets: literal thirst traps laced with pheromones.

See What the Inside of a Volcano Looks Like, Courtesy of Some Unlucky Drones

Two unlucky drones were sacrificed to capture this incredible footage from inside an active volcano's crater.

Study Suggests That Some Sharks Sleep—And They Keep Their Eyes Open When They Do

A new study suggests that some sharks do sleep, even though they appear to be wide-awake when they're catching up on theirs Zs.

Save Up to 60 Percent Off Thousands of Products at Backcountry’s Winter Clearance Sale

During Backcountry’s Winter Clearance Sale, customers can save up to 60 percent off coats and outerwear from brands like The North Face and Patagonia.

You Can Win a $4.3 Million Lake Tahoe Home Thanks to This Omaze Sweepstakes

Omaze is currently offering a sweepstakes where people can enter for the chance to win a $4.3 million Lake Tahoe home.

An osprey flies while carrying a fish in its talons.

11 Facts About Ospreys

Ospreys were once threatened by hunting and pesticides, but these birds of prey made a dramatic comeback.

Leaves of the Conophytum bilobum succulent.

Your Plant Addiction Is Fueling a Succulent Poaching Crisis

Rare succulents native to California and South Africa are being poached to meet soaring demand from houseplant collectors.

Doctors in Canada Can Prescribe Annual National Park Passes to Patients

Soon, patients in Canada will have a good reason to make spending more time in national parks part of their regular health routine.

Meet the Sea Slug With the Disposable Penis

Fans of '90s alternative music may recall King Missile's big single, "Detachable Penis." While the song may have been silly, it turns out than in the animal world, the idea isn't all that bizarre—at least not to the sea slug Chromodoris reticulata.

Andrey Danilovich/iStock via Getty Images

AllTrails Shows You the Best Biking and Hiking Trail Maps Around the World

AllTrails's database of hiking and biking trails makes exploring the great outdoors feel much less intimidating.

A spectacled flying-fox bat in Australia.

7 Misconceptions About Bats

If you're worried that a bat is looking to swoop down at any given moment and suck down a few pints of your precious blood, we've got really great news for you.

Is Catnip Bad for Dogs?

Cats on catnip can be quite fun to watch. Can dogs get in on the action? Yes, but it probably won’t be as entertaining.

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