On earth a sound echo lets you hear something again. Over great distances, a light echo can let you see something again, specifically an exploding star.

Jessi and Squeaks introduce you to the amazing, unusual animals and plants from a place like nowhere else on earth: Madagascar!

Hank gives you the facts on stem cells - what they are, what they're good for, where they come from, and how they're used in medicine.

Like most quizzes on the internet, personality tests aren't what you would call "reliable."

Jessi and Squeaks are getting ready to make some delicious banana bread, but did you know that bananas aren't your typical fruit?

Not only is this gecko adorned with beautiful coloration, but the same thing that makes it look so pretty could help us understand where some our cancers come from and how to stop them from progressing!

Living things have engineered some pretty awesome materials, but I'm not sure anything measures up to spider silk. It's as strong, as stretchy, and as resilient than even humans' most advanced creations like Kevlar and steel. So how do...

We might be closer to figuring out how our solar system was born and NASA has two finalists for its next New Frontiers mission.

Would you like to play a game, Dr. Falken? Actually, this episode isn't really about games, or Matthew Broderick, or Thermonuclear War. But enough with the long references to 1983's best movie, War Games. Today Jacob and Adriene are...

Explore inheritance when carried on the X chromosome with the Amoeba Sisters! This video focuses on how to do general Punnett square problems that involve traits on the sex chromosomes (X and Y chromosomes). We do want to point out...

Sorting organisms into categories seems pretty simple at first, but look a little closer and things get weird.

In this video Paul Andersen defines adaptations and explains how organisms can become better adapted to their surroundings using the process of natural selection. Specific examples of adaptations, like coat color in rock pocket mice, as...

If you’ve ever been scratching a dog and seen them do the kicky leg thing, it’s truly adorable. But it might not necessarily be a feel-good thing.

Learn how magnetic bacteria work, and how scientists think they can help technology in the future!

A universal cure for cancer would be a truly historic achievement in medicine, and it seems that scientists may have found it... by accident.

Clouds can look like castles made of cotton candy, or they can be thin and wispy. But have you ever wondered what clouds actually are?

This Amoeba Sisters video introduces science lab safety guidelines with memorable illustrations and an accompanying handout listed under "safety". This video includes the discussion of proper lab attire, importance of proper disposal of...

Whether you're out camping, cooking, or snuggled up in front of your fireplace, you know that fire is hot! But why? Join Jessi and Squeaks to learn how fires turn wood or other fuel into useful heat!

How worried should you be when your urine isn't yellow, but instead it's green, red, or even black?

You might’ve heard people talking about how awesome psychotherapy can be, but is it actually effective?

By 2050, the global population is projected to reach 9.8 billion. How are we going to feed everyone? Investment-banker-turned-farmer Stuart Oda points to indoor vertical farming: growing food on tiered racks in a controlled,...

This week on SciShow News, scientists found that social interaction triggers the production of the “bliss molecule” in mice. Plus, eating sugar is about more than just the calories.

How does dark energy affect the universe's expansion? Measuring past expansion history should tell us the future expansion without ever having to count any galaxies. To measure this we need to measure the redshift-distance relationship,...

In the South Pacific, there is a rare tree so rich in metal that its sap runs blue.