Central Heterochromia: When to Worry About Eye Color

Central Heterochromia: When to Worry About Eye Color

Our Top Reads

Deep Blue: Shark of IMAX-worthy Proportions

By Nico Avelle

Is Lavender Safe for Cats? That's a Hard No

By Zach Taras

Jim Cummings: The Voice of Millennial Childhoods

By Zach Taras

Phineas Gage and the Birth of Modern Neuroscience

Phineas Gage and the Birth of Modern Neuroscience
16 Most Dangerous Amazon Animals: Look but Don't Touch

16 Most Dangerous Amazon Animals: Look but Don't Touch
Paradise Flying Snake Truly Falls With Style

Paradise Flying Snake Truly Falls With Style
15 Must-see Mountain Ranges in the U.S.

15 Must-see Mountain Ranges in the U.S.

Try Our Crosswords, Riddles and Puzzles!

Can You Solve This Riddle?

Can You Solve This Riddle?
Play Our Crossword!

Play Our Crossword!
Can You Solve This Riddle?

Can You Solve This Riddle?

In the News

The Copperhead Snake Is Seldom Lethal But Always Venomous

April 13 By Zach Taras, John Perritano

Rube Goldberg: The Man Behind the Ingenious Contraptions

April 10 By Stell Simonton

Oedipus Complex: Digging Into Freud's Controversial Theory

April 10 By John Donovan

Neuschwanstein Castle: The Real Story Behind the Fairy-tale Fortress

April 10 By Dave Roos

The Ring of Fire Is the Pacific's Volcanic Hotspot

April 10 By Mark Mancini

What Is Zionism and Is It Fueling the Palestinian-Israeli Conflict?

April 9 By Dave Roos

How to See and Delete Your Google History

How to See and Delete Your Google History
What Does It Mean When Someone Says 'That's Just Semantics'?

What Does It Mean When Someone Says 'That's Just Semantics'?

Did You Hear?

Donskoy Cat, Don Sphynx, Russian Hairless: All the Same

Donskoy Cat, Don Sphynx, Russian Hairless: All the Same
Steppe: A Civilization-altering Biome Most People Can't Name

Steppe: A Civilization-altering Biome Most People Can't Name
Lake Natron: Where Impossibly Salty Water Matches Flamingos

Lake Natron: Where Impossibly Salty Water Matches Flamingos
Nebelung Cat: A Long-haired, Silver-tipped Beauty

Nebelung Cat: A Long-haired, Silver-tipped Beauty
10 Types of Lions (Including 4 Extinct Species)

10 Types of Lions (Including 4 Extinct Species)

Science

What Does Space Smell Like?

What Does Space Smell Like?
Were U.S. Interstates Really Designed as Runways?

Were U.S. Interstates Really Designed as Runways?
16 World-Famous Architects and Their Impact

16 World-Famous Architects and Their Impact
Are the Sodium Lauryl Sulfates in Shampoo Safe?

Are the Sodium Lauryl Sulfates in Shampoo Safe?

Culture

'Acoustic Kitty': The CIA's Not-so-purrfect Plan to Make a Cat a Spy

'Acoustic Kitty': The CIA's Not-so-purrfect Plan to Make a Cat a Spy
The Man Behind the Legend Who Is Sitting Bull

The Man Behind the Legend Who Is Sitting Bull
ADX Florence: America's Most Secure 'Supermax' Prison

ADX Florence: America's Most Secure 'Supermax' Prison
10 Little-known Facts About the Founding Fathers

10 Little-known Facts About the Founding Fathers

Animals

3 Types of Dinosaurs and Their Many Subtypes

3 Types of Dinosaurs and Their Many Subtypes
The Coatimundi Is Cute But Doesn't Make a Good Pet

The Coatimundi Is Cute But Doesn't Make a Good Pet
Giganotosaurus Wasn't Just a 'Jurassic World' Creation

Giganotosaurus Wasn't Just a 'Jurassic World' Creation
Why Chicken Egg Colors Vary From Bird to Bird

Why Chicken Egg Colors Vary From Bird to Bird

Auto

What Happens if I Put Sugar in Someone's Gas Tank?

What Happens if I Put Sugar in Someone's Gas Tank?
How to Escape a Sinking Car

How to Escape a Sinking Car
What Is a Carburetor and Why Does Your Car Need the Part?

What Is a Carburetor and Why Does Your Car Need the Part?
How a Manual Transmission Works

How a Manual Transmission Works

Editor's Picks

The Sun Spider Is an Arachnid but Not an Actual Spider

The Sun Spider Is an Arachnid but Not an Actual Spider
Did You Know There Are 23 Countries in North America?

Did You Know There Are 23 Countries in North America?
The Richest Family in the World Heads a Massive U.S. Chain

The Richest Family in the World Heads a Massive U.S. Chain

A River Runs Through It

The 9 Longest Rivers in the World: From the Nile to the Congo

The 9 Longest Rivers in the World: From the Nile to the Congo
Eco Engineers: 5 Animals That Can Reshape Earth's Waterways

Eco Engineers: 5 Animals That Can Reshape Earth's Waterways
River-bottom Bones: The Strange World of Underwater Fossil Hunting

River-bottom Bones: The Strange World of Underwater Fossil Hunting

Get Your Garden On

How 'Lasagna Gardening' Helps Create Healthy Soil

How 'Lasagna Gardening' Helps Create Healthy Soil
How Composting Works

How Composting Works
Companion Planting: The Do's and Don'ts of Growing Plants Together

Companion Planting: The Do's and Don'ts of Growing Plants Together

Deserts of the World

5 of Earth's Highest Deserts

5 of Earth's Highest Deserts
10 Largest Deserts in the World

10 Largest Deserts in the World
Hunting for Martians in the Most Extreme Desert on Earth

Hunting for Martians in the Most Extreme Desert on Earth