According to the cosmological principle, the universe is more or less the same in all directions. But what happens when we put this to the test?

SciShow heads to Washington D.C. to join the March for Science and interview people about why they feel science is important to them.

Dark Energy is what we call the mysterious force that seems to be pushing the universe apart. By some calculations, it makes up 70% of everything in nature. Or...maybe it doesn’t exist at all! Plus, Juno’s observations give us new...

Extreme environments full of life on Earth have led researchers to expand the definition of habitability to something that includes many more planets, potentially leading us to evidence of living things in a dramatically shorter time!...

The ancestors of modern, squishy cephalopods like the octopus and the squid all had shells. In ancient times, their shell was their greatest asset but it eventually proved to be their biggest weakness.

Nowadays, we're pretty confident about how the dinosaurs died out, but there are still other extinctions throughout Earth's history, some big, some small, that remain unsolved.

Scientists have discovered an underground lake of liquid water on Mars! While this isn’t itself evidence for life on Mars, it does raise some new possibilities.

Telekinesis, the ability to manipulate matter with the mind alone, is a trait exhibited by some of the most iconic fictional characters, including Neo, Yoda, and, of course, Carrie. But is this mind control actually possible in real...

Sensory deprivation tanks, oxygen therapy chambers and unbelievably cold saunas - oh my! These machines are used to reduce stress, ease pain and could be useful in doing that, but these machines are generally meant to be used in very...

Only if you are truly open to the possibility of being wrong can you ever learn, says researcher Alex Edmans. In an insightful talk, he explores how confirmation bias -- the tendency to only accept information that supports your personal...

We’ve developed thousands of technologies for space exploration, but luckily for us, sometimes those solutions apply to problems here on the ground, too.

Like a common cold or a cold sore, would it be possible to get a reinfection of COVID-19? Would we be able to build up long-term resistance to it?

It seems silly to ask if plants can count, but even the New York Times has called Venus flytraps 'Plants That Can Count.' Is counting a thing plants can do?

Astronomers have found a Hot Jupiter - WASP-121b - that is leaking metal, and put together a new 3D map of the Milky Way showing that our galaxy is actually a bit twisted!

Here it is, folks: the end. In our final episode of Crash Course Astronomy, Phil gives the course a send off with a look at some of his favorite topics and the big questions that Astronomy allows us to ask.

Scientists found that the prevailing hypothesis of how the Alzheimer’s disease starts might be wrong, and some viruses could be the culprit.

Investigate the theories surrounding cosmic dust bunnies and discover how the tiny particles could hold the key to the formation of life on Earth. -- Consider the spot where you’re sitting. Travel backwards in time and it might’ve been...

There is an epidemic of HIV, and with it an epidemic of bad laws -- laws that effectively criminalize being HIV positive. At the TEDxSummit in Doha, TED Fellow Shereen El-Feki gives a forceful argument that these laws, based in stigma,...

Selecting which solution is the best solution to a problem may seem difficult at first. But if you are patient and think about what you need an effective solution to be, you can do it. In this episode of Crash Course Kids, Sabrina shows...

Scientists may have found a recombinant variant of COVID-19 in the wild, and its mixed DNA could be essential to the coronavirus life cycle.

The first week of school can be uncomfortable enough as you adjust to a new situation, but it was probably even worse back when schools made you strip down for a nude photo shoot,even if they thought they had a good reason for it.

In medicine, there's often a disconnect between news headlines and the scientific research they cover. While headlines are designed to catch attention, many studies produce meaningful results when they focus on a narrow, specific...

The Greeks had a simple and elegant formula for the universe: just earth, fire, wind, and water. Turns out there's more to it than that -- a lot more. Visible matter (and that goes beyond the four Greek elements) comprises only 4% of the...

If you study a map of the Cosmic Microwave Background, or CMB, you may notice a large, deep blue splotch on the lower right. This area, creatively named the Cold Spot. Is this feature a statistical fluke, the signature of vast...