WhatsOnVideo: the best science videos on YouTube

Every video here comes from a channel we follow that explains science for everyone: NASA, PBS, Kurzgesagt, Veritasium and many smaller teachers. No UFO or conspiracy channels. Stars come from public numbers, not a review: reach for the channel's size, how many viewers liked it, and how many commented.

About this page: the best science videos on YouTube

Science explained for everyone, from more than 70 channels: NASA, the European Space Agency, PBS, Kurzgesagt, Veritasium, SmarterEveryDay, 3Blue1Brown and many smaller teachers. Pick a shelf: space, rockets, physics, the human body, evolution, chemistry, engineering, math, Earth and climate, or the big 'what if' questions. We leave out UFO and conspiracy channels.

What are the best science channels on YouTube?

The ones on this page are a good start. Every video is scored by the same size-neutral star rule, so a small channel with a well-loved video ranks right alongside the big ones.

Is there anything here for kids?

The videos are made for a general audience and many are great for curious older kids, but this isn't a kids' page, so preview anything you're unsure about.

Is it free?

Yes. There are no accounts, no sign-ups and no subscriptions. Every video is free to watch on YouTube.

How are the stars worked out?

Politics has no stars; it is sorted by time, newest first. Everywhere else, stars come from public numbers, not reviews, and never from how big a channel is. Each video is scored on three things: how far it reached for the size of its channel, how many viewers liked it, and how many talked about it in the comments. Only videos with two stars or more are listed. The guide 'How the stars work' has the details.

🆕 New Releases

Mitochondria Are Not Just Powerhouses, They're Running the Entire Body

Let's Talk About Tesla's Rocket Car.... Even Though I'm Supposed to be On Vacation

Lucid Bought My Car Back, So I Bought A Mach-E

What happens to TIME in a black hole? (And why physicists can’t agree)

Our Solar System is Mixing with Others

Professor Moriarty and the Physics of Holodecks - Sixty Symbols

Sophie Adenot's return to Earth - Statement from Cologne Airport

Everything About Dark Matter & Dark Energy (Compilation)

NEW Meridian C160 - 3D Printed Telescope Kit

Alkaline batteries are obsolete — but not for the reason you'd think

There's never been a better time to go into math

NASA Is Making Big Changes To Artemis

🚀 Rockets & Space Missions

Let's Talk About Tesla's Rocket Car.... Even Though I'm Supposed to be On Vacation

Blue Origin Taller Lunar Lander, SpaceX Launches All Its Rockets - Deep Space Updates Oct 6th

NASA tested my chain theory in space

The Incredible Sounds of the Falcon Heavy Launch (BINAURAL AUDIO IMMERSION) - Smarter Every Day 189

How far can Voyager 1 go before we lose contact?

Has SpaceX Done Anything NASA Hasn't?

What will SpaceX do when they get to Mars?

The Missions Bringing Us Back to the Moon

Voyager 2 Discovers Wall of Fire at Solar System's Edge

How SpaceX Will Build a City on Mars

How NASA Will Build The Artemis Moon Base

Voyager 1 and 2 Detected Something Beyond the Edge of Our Solar System

Explaining the Most Important Artemis II Photos

A conversation with Elon Musk about Starship

Go up SpaceX's Starship-catching robotic launch tower with Elon Musk!

NASA Engineer Designs a Near Light Speed Engine But Does It Work?

🪐 Space & the Universe

I proved 1.3 million Earths DON'T fit inside the Sun!

What happened before the Big Bang?

Is There a Fundamental Limit to Space and Time? The Planck Scale Explained

A Massive New Crater Just Appeared on the Moon

Blue Origin Taller Lunar Lander, SpaceX Launches All Its Rockets - Deep Space Updates Oct 6th

JWST Just Discovered a Brand-New Class of Cosmic Objects

What happens to TIME in a black hole? (And why physicists can’t agree)

The Entire History Of The Moon

How To Use An EQ Telescope

How do black holes get so SUPERMASSIVE?

Our Solar System is Mixing with Others

What happened this month at the European Space Agency? (October 2026)

NEW Meridian C160 - 3D Printed Telescope Kit

What Do Alien Civilizations Look Like? The Kardashev Scale

Fields of Space (1969)

Hubert Reeves: Star Teller (2002)

⚛️ Physics & the Quantum World

A laser pointer at 2 billion fps makes the speed of light look... kinda weird

The REAL source of Gravity might SURPRISE you...

I bought 1000 meters of wire to settle a physics debate

How fast is gravity?

Professor Moriarty and the Physics of Holodecks - Sixty Symbols

Everything About Dark Matter & Dark Energy (Compilation)

A.I. Physics Exam (extra footage) - Sixty Symbols

Why No One Has Measured The Speed Of Light

Darker Than Vantablack—Absorbs 99.9923% of Light

What if you put your head in a particle accelerator?

Can Light be Black? Mind-Blowing Dark Light Experiments!

Why Going Faster-Than-Light Leads to Time Paradoxes

If the universe is only 14 billion years old, how can it be 92 billion light years wide?

The Speed of Light is NOT About Light

Wabano: The Light of the Day (2022)

The Northern Lights (1992)

🧠 The Human Body & Brain

Mitochondria Are Not Just Powerhouses, They're Running the Entire Body

Out of Body Experience Experiment Makes Some Strange Discoveries

What Vaping Does to the Body

What Can You Do Without a Brain?

Why Don't We All Have Cancer?

The World's Most Dangerous Blood Type

How a quartz watch works - its heart beats 32,768 times a second

What stretching actually does to your body ft. Sofie Dossi

You Can Literally Die From a Broken Heart | Broken Heart Syndrome

Have We Discovered a Cure for Cancer... on Accident?

Dianna Health Update from SmarterEveryDay

Can The Human Body Handle Rotating Artificial Gravity?

The REAL Three Body Problem in Physics

Are Neurons Just Electric Circuits?

The Fight: Science Against Cancer (1950)