It seems wild that some animals basically trade in their bodies for new ones during their lifetime, but it's actually really common – and it makes a lot of sense.

You've probably heard of cancers having stages, but what do all those stages really mean? This video is a 101 to explain cancer diagnosis and decode the jargon for you. And even if you've heard of the numerical stages, you might not know...

There's a lot of interest in knowing your future when you're a kid. But one thing you can know with basically 100% certainty isn't one you'd expect - your risk of developing type one diabetes. So if one simple blood test can tell you if...

Thousands of years ago, indigenous farmers in the Amazon created exceptionally fertile soil. Today, scientists think it could restore the succession of rainforest plants and help reverse the effects of climate change.

The Five Stages of Grief show up in media everywhere from The Simpsons to Robot Chicken, but scientists have long been working on better ways to think about grief.

We traveled to Bozeman, Montana to meet with Dr. Ellen-Therese Lamm who explores ancient life by studying it at the cellular level. Kallie and Dr. Lamm discuss how she does this, and what she's learned by putting dinosaur bones under a...

Your eyes get heavy and gradually close... But wait! It's only lunch time and you still have so much to do. Would taking a nap help? Or would it derail your day? Well, that depends on a few things— especially what stages of sleep the nap...

If a doctor has told you to quit smoking, that's not just because they're worried about lung cancer. Those cigarettes are messing up your body's natural healing process in more ways than one.

Objectively, some shows end with rough final acts, but we are finding that this isn’t the only factor in our discontent. Unsatisfactory finales also reflect common types of relationships we build with fictional characters.

Scientists report that humans might be quick to judge, but we we may have also evolved to be quick to forgive. And in another paper out this week, scientists have discovered a new type of human stem cell!

You spend weeks studying for an important test. On the big day, you wait nervously as your teacher hands it out. You're working your way through, when you're asked to define "ataraxia." You know you've seen the word before, but your mind...

How do you navigate life's growing number of transitions with meaning, purpose and skill? Writer Bruce Feiler offers a powerful way to handle uncertain, painful and confusing times -- or "lifequakes", as he calls them. Learn how to equip...

After learning about mitosis and meiosis from our individual videos, explore the stages side by side in this split screen video by The Amoeba Sisters! Expand video details for table of contents. Vocabulary in this video includes...

It's 4am, and the big test is in 8 hours. You've been studying for days, but you still don't feel ready. Should you drink another cup of coffee and spend the next few hours cramming? Or should you go to sleep? Shai Marcu defends the...

Since the dawn of humanity, an estimated 100.8 billion people have lived and died, a number that increases by about 0.8% of the world's population each year. What happens to all of those peoples' bodies after they die? And will the...

There's nothing quite like a good night's sleep. What if technology could help us get more out of it? Dan Gartenberg is working on tech that stimulates deep sleep, the most regenerative stage which (among other wonderful things) might...

The 1960s were an optimistic time for space exploration - so much so that a team designed a rocket called the Sea Dragon that was big enough to launch an entire space station from the sea in one go!

Perhaps you’ve punched out a paper doll or folded an origami swan? TED Fellow Manu Prakash and his team have created a microscope made of paper that's just as easy to fold and use. A sparkling demo that shows how this invention could...

One way of thinking about family life says that there are stages that families move through: courtship, marriage, child-rearing, and family life in your later years. We’ll also discuss changing patterns of marriage and childbearing in...

Clinical Sexologist and Sexplanations Host Lindsey Doe teaches Hank the difference between HIV and AIDS. Then Chinchilla Ash teaches Hank about softness.

Cha
pters

View all

LIND
SEY DOE
...

In this video Paul Andersen explains how the center of mass of an object represents the average position of matter in an object. The center of mass of a system is a combination of all the objects within the system. As long as no...

60 years ago, in January 1958, the United States launched its first satellite, Explorer 1.

In which Hank does some push ups for science and describes the "economy" of cellular respiration and the various processes whereby our bodies create energy in the form of ATP.

The Five Stages of Grief show up in media everywhere from The Simpsons to Robot Chicken, but scientists have long been working on better ways to think about grief.