I don't know about you, but I'm an individual that has always been fascinated by the big questions in life, such as what happens to us when we die, or what time actually is. That's why it's always a good day for me when I come across a documentary that goes a long way toward formulating reasonable answers to those questions. To celebrate the beauty of our world and the vastness of our universe, I've made a collection of the finest "big question" documentaries just for you.
To watch a documentary, just left-click on any of the photos below with your mouse. If you want to watch another, just click on the 
button in the upper right corner of the video. If you wish to view the documentary in full size, the full screen button is located on the bottom right of the video player. Happy viewing!
Images (including cover) by Deposit Photos.
42:14
Physicist Michio Kaku: The Universe in a Nutshell...
Physicist Michio Kaku explains the fundamental nature of our universe
11:53
These Cases Were Cold... Until Science Cracked Them
Technology and science aren't always about the future. Take a look at these cold cases that were solved only thanks to the advances of science.
2:39
Science Lesson: Why is Space Black?
This video will explain why exactly space is the color it is - black.
Test Your Knowledge of Our Solar Neighborhood!
This quiz will put your knowledge of our solar system to the test!
Travel From the Sun to Pluto With Our Interactive Guide!
The solar system is a fascinating place, and we wanted to bring you an interactive journey that you can use to travel through it. Enjoy the journey!
7:17
What on Earth Is Quantum Computing? Find Out Here
This short video below explains everything you need to know about quantum computers.
8 Biggest Mysteries Still Surrounding the Human Body
Although modern science has revealed much about the human body, there are some things that still remain unknown. Here are the 8 biggest mysteries about it.
Find Out How Some Elderly People Stay Sharp into Old Age
Some old people have better memories than people half their age. This could be the reason why...
Enjoy This Fascinating Collection of NASA's Best Photos!
Here are 15 of NASA's most amazing recent pictures, along with brief explanations of exactly what is going on in each one.
5 Puzzling Mysteries That Science Finally Managed to Solve
These weird occurrences have puzzled humanity for decades, if not centuries. Finally, scientists solved them & the solutions are exciting...
20 Useful Facts About the Science of Cooking
The science behind cooking is not often thought of, but it plays a crucial role in a dish turning out right. Here are 20 facts on the science of cooking.
5:16
How The Brooklyn Bridge Narrowly Escaped Never Being Built
Learn about the fascinating, but equally tragic history of the construction of Brooklyn Bridge in this engaging and educational video
2:17:01
Astronomy: What is Beyond the Edge of the Universe?
In this video, we explore what modern astronomy reveals about the universe’s boundaries—if they even exist.
New Study Reveals: The Sleeping Viruses We Carry Within Us
A large new study followed more than 1,150 patients who were hospitalized with COVID-19, tracking them closely during their illness and for a full year afterward. What the researchers found sheds new light on these hidden passengers, and on why some
10 Fascinating Psychological Facts You Should Know About
Psychology is the science of studying the individual and the things that make us, as humans, tick. These 10 psychological facts you've never heard of before will make for fascinating reading material.
Will We Ever Solve Our Universe's Most Complex Mysteries?
Here are 8 of the biggest unsolved mysteries from the world of physics.
These Optical Illusions Will Shock Your Mind!
Optical illusions create miscommunication between our eyes and brain making, us see things that are not really there or not see things that are right in front of us. See for yourself.
Meta Unveils New Glasses that May Change Sports Forever
META has revealed a new line of AI-powered smart glasses: Oakley Meta HSTN
Science News: AI-Designed Drugs Move to Human Trials
Isomorphic Labs, is positioning itself to begin human clinical trials of medications designed entirely through artificial intelligence, marking a potentially transformative shift in how we develop life-saving treatments.
12 Steps That Help to Explain Einstein's Famous Theory
Have you ever wondered what Einstein's Theory of Relativity is all about? If you have, here is an easy-to-understand explanation!
12:18
Do We REALLY Have Free Will or Is It An Illusion?
When you "decide" anything, was it ever really up to you?
Phone Overheating? Use Our Guide to End The Problem!
Is your cell phone overheating? If so, read this handy guide, which will help pinpoint the source of the problem and offer a solution for fixing it.
15:18
The Entire History of the Universe in One Year
Imagine compressing the entire 13.8-billion-year history of the cosmos into a single calendar year. In this cosmic calendar, the Big Bang erupts on January 1st, but our home planet and the Sun don’t even exist until late August.
18:14
Are These Vintage Kitchen Gadgets Any Good?
Will any of the vintage kitchen gadgets stand the test of time or outperform their contemporary alternatives?
14:13
Physics Explained Simply: From 0 to 7 Dimensions
Using physics, geometry, and Flatland-style experiments, discover why our universe is stranger than it appears - and why our brains struggle to see it.
These Ancient Inventions Have Got Scientists Stumped!
Here are 12 items from long ago which prove that our ancestors possessed knowledge and skills far more advanced than we once believed them to be.
Anti-Aging Science in 2026: What's Real and What's Hype?
Here's an honest look at where anti-aging medicine stands in 2026 - the promising, the disappointing, and the surprisingly simple things that still beat almost everything in a pill bottle.
4:49
This Video Shows You a Different Way to Look at the World
You’ve heard of the fourth dimension but do you know what it is? This TED-Ed video helps uncover a bit of the mystery.
I Bet You Didn't Have a Clue About These Human Body Facts!
The human body is the most complex machine known to mankind, but I bet you don't know these 10 amazing facts about it...
Travel From the Sun to Pluto With Our Interactive Guide!
The solar system is a fascinating place, and we wanted to bring you an interactive journey that you can use to travel through it. Enjoy the journey!
World-Famous Psychological Experiments That Shocked Us
The human mind is a most intricate thing. It also has some quirks and idiosyncrasies that are both incredible and a little uncomfortable. Read on for more.
4:26
Despite Looking Similar, Cats Are MORE Diverse Than Dogs!
Who's more diverse, cats or dogs? This video answers this question once and for all, the it might surprise you...
Nobody Believed These 5 Scientists, But They Were Right
These 5 scientists were shamed and ousted, or rudely ignored, although years later, their "crazy" theories turned out to be true...
9 of the Greatest Unsolved Mysteries About the Universe!
The universe has been around for close to 14 billion years, but it still holds many mysteries that continue to perplex scientists. Here's 9 of them!
21:25
How Every Nuclear Power Got Its Atomics
This video will explain how each nation earned the complex and controversial title of nuclear power.
27:25
This Man Gave ChatGPT a Body. This is What Happened.
What if you could build a robot that learns everything from scratch, for just eighty dollars?
This Research Shows How Fasting Can Slow Down Aging
A recent study has found that a molecule produced while fasting has an anti-aging effect on vascular system. Learn all about it here.
Six Inventions Da-Vinci Made Ahead of Their Time
He created and envisioned many inventions that were sometimes even centuries ahead of their time. Was there ever a genius as great as Da-Vinci?
The 10 Most Elaborate Scientific Hoaxes In History!
Some hoaxes throughout history have been so believable, they managed to fool the entire world. Here are 10 of the most elaborate scientific hoaxes in history.
Uncover the Secrets of the Universe in These Documentaries
This list of riveting space documentaries will help you unlock the mysteries of the universe and beyond.
Superwood: A New Material That Could Replace Steel
After decades of relying on steel—a material that produces nearly two tons of CO2 for every ton manufactured—builders may soon have access to something far more sustainable and surprisingly stronger: Superwood.
17:00
Fascinating: I Spent an Entire Week in Virtual Reality
This man decided to answer the question: What happens when you spend a week in virtual reality?
2:41
Trick-Mousing is Such Adorable Entertainment...
Mice are much cleverer than most people believe, and they easily respond to training, as long as you use positive reinforcement, or in other words - reward them frequently for their behavior with food.
7:15
Toilets: The Greatest Medical Advancement in Human History
While toilets make some people laugh, they are actually a deadly serious medical advancement. This video explains what toilets mean to civilization.
5:10
Science Lesson: A Simple Guide to Chaos Theory
This is the story of chaos theory, and how it transformed our understanding of reality.
5:28
Just How Small is an Atom? - Fascinating!
Just how small are atoms? And what's inside them? The answers turn out to be astounding...
Let's Learn All About Your White Blood Cells
White blood cells (WBCs) are the part of your immune system which is responsible for fighting infection. Learn all about them here!
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