Can you catch cancer from someone else?

Just like the myth that plucking one gray hair will make three sprout, stress making your hair white isn't actually a thing. Or is it?!

What if I told you that, more than two billion years ago, some tiny living thing started to live inside another living thing .... and never left? And now, the descendants of both of those things are in you?

Several companies are developing 3D printers that might eventually be able to print organs...in space! What!?

It's no surprise that heart tissue and bone tissue have really different jobs. So why does it happen?

Paul Andersen explains how cells duplicate through the process of cell division. Prokaryotic cells (like bacteria) duplicate through a process of binary fission. Eukaryotic cells (like you) duplicate body cells through mitosis and...

Researchers have found ancient communities of microbes that have been buried deep, for a hundred million years! This discovery might be the oldest living thing on Earth, and could even expand the search for life on other planets.

Crocodiles have four-chambered hearts, just like we do! But, while our hearts do just fine with four valves, they have a slightly different approach…

From ripping your own appendages off to cockroach mind control, wasps go to great lengths to ensure the survival of their species.

Two bespectacled science YouTubers enter, one bespectacled science YouTuber leaves ... because while they may look suspiciously alike, Joe Hanson has his own channels while Hank’s gonna stick around here. The only question is who will...

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

Paul Andersen explains how eukaryotic cells use compartmentalization to increase the surface area and level of specialization within the cell. Prokaryotic and eukaryotic cells are compared and contrasted. The role of both the...

During World War I, scientists were trying to develop an antidote to the poisonous yellow cloud known as mustard gas. They discovered the gas was irrevocably damaging the bone marrow of affected soldiers. This gave the scientists an...

The pee you just flushed without thinking could be a great sample to know what is going on in your body!

Puberty is a wild time in human bodies, and so much goes on as they transform from a child to an adult. But it turns out, the whole process is controlled by a single protein - and it’s probably one you’ve never even heard of.

Claude Monet had a very unique eye, and it can teach us a bit about the science of vision

Paul Andersen explains how viruses reproduce using the lytic cycle. He also shows how viruses can pick up new genetic material and how retroviruses (like HIV) can enter into the lytic cycle. He also describes the lysogenic cycle and...

Your body is made of cells -- but how does a single cell know to become part of your nose, instead of your toes? The answer is in your body's instruction book: DNA. Joe Hanson compares DNA to detailed manual for building a person out of...

There are currently hundreds of thousands of people on transplant lists, waiting for critical organs like kidneys, hearts and livers that could save their lives. Unfortunately, there aren't enough donor organs available to fill that...

That intense shooting cold pain in the teeth when you bite into a cold ice cream cone just hits differently than, say, making a snowball with your bare hands. But what makes cold teeth feel so much more painful than cold skin?

Our bones are multi-functional body builders, but perhaps their most mysterious function is the production of blood. Scientists now think they have a pretty good idea why this is where our blood gets made.

You might think your grandma who wakes up at 4am just needs less sleep than younger people. Not so! Studies suggest there are some bizarre reasons older people rise at the crack of dawn, including something called brain sand!

Have you ever had a romantic moment ruined by a cold runny nose? Michael Aranda explains why it happens in this episode of SciShow Quick Questions.

Paul Andersen explains how plants use hormones to respond to their environment. The following hormones are detailed; auxin, cytokinins, gibberelins, abscisic acid and ethylene.