SciShow
Why We'll Never Build a Perfect Clock
We can make clocks that keep accurate time for millions of years. We can also make clocks with such high resolution they tick one billion billion times per second. So why can't we make a clock that does both?
PBS
How Does Gravity Affect Light?
We know that gravity exerts its pull on light, and we have an explanation for why. Actually, we have multiple explanations that all predict the same thing. And at first glance, these explanations seem to describe completely different...
PBS
Does Time Cause Gravity?
We know that gravity must cause clocks to run slow on the basis of logical consistency. And we know that gravity DOES cause clocks to run slow based on many brilliant experiments. But I never explained WHY or HOW gravity causes the flow...
Be Smart
How We Solved the Greatest Riddle In Navigation
Humanity’s drive to explore our planet is one of the defining characteristics of our species. But exploration only works if you know where you are at any given time. Not so easy when you are out at sea with no visible landmarks and the...
SciShow
Did We Find Longitude Thanks To A...Clock?
The equator is a clear and accurate line around Earth that makes measuring latitude a precise science, but when it came to figuring out how to do that with longitude, British sailors were at a loss. Until they devised a competition....
MinutePhysics
How to Build a Teleporter with Aliens
The first 200 people to use http://skl.sh/minutephysics30 get 30% off a premium Skillshare subscription. This video is about the international system of units (SI), the international prototype kilogram (the IPK or "le grande k"), and...
PBS
The Leap Second Explained
Every once in a while we add a second onto our days. Similar to the Leap Year, this is known as the Leap Second. But, if the Leap Year already helps us account for the offset from a calendar in days, what exactly does the Leap Second do?...
SciShow
The Mysterious Leap Second
Leap Day's got nothing on the Leap SECOND! Hank explains why a second is being added to 2012 and why some are upset about it.
TED-Ed
TED-ED: How plants tell time - Dasha Savage
Morning glories unfurl their petals like clockwork in the early morning. A closing white waterlily signals that it's late afternoon. And moon flowers, as their name suggests, only bloom under the night sky. What gives plants this innate...
TED-Ed
TED-Ed: How did trains standardize time in the United States? - William Heuisler
If you live in the United States, you may live in the Eastern Standard Time Zone. Or maybe you live in Mountain Standard Time or one of the other standardized time zones. But these time zones have not always been around. In fact, it's a...
SciShow
A Brief History of Timekeeping
It's time for another leap second! Join SciShow as we celebrate by exploring the long and strange history of timekeeping.
TED-Ed
TED-Ed: Is time travel possible? - Colin Stuart
Time travel is a staple of science fiction stories, but is it actually possible? It turns out nature does allow a way of bending time, an exciting possibility suggested by Albert Einstein when he discovered special relativity over one...
SciShow
How Jupiter’s Moons Showed Us the Speed of Light
Light travels through space as fast as anything in the universe possibly can, but before scientists could figure out light’s speed, they had to figure out whether that speed was even finite.
TED-Ed
TED-Ed: How does your smartphone know your location? - Wilton L. Virgo
GPS location apps on a smartphone can be very handy when mapping a travel route or finding nearby events. But how does your smartphone know where you are? Wilton L. Virgo explains how the answer lies 12,000 miles over your head, in an...
Be Smart
Why It Is What Time It Is (The History of Time)
How did we come up with our system of telling time? Why do we divide the day into 24 hours of 60 minutes each, and put 60 seconds in each minute? Where does the definition of a second come from? And who decides what clock shows the...
SciShow
Did We Find Longitude Thanks To A...Clock?
The equator is a clear and accurate line around Earth that makes measuring latitude a precise science, but when it came to figuring out how to do that with longitude, British sailors were at a loss. Until they devised a competition.
Curated Video
Exploring Bomb Cyclones: The Formation and Characteristics of Intense Storms
In this video, the concept of bomb cyclones is explored, highlighting their connection to climate change. The term "bomb" refers to the rapid formation of these storms rather than their intensity. Bomb cyclones share similarities with...
Curated Video
Advancements in Weather Forecasting: From Prediction to Nowcasting
This video discusses the challenges of predicting and forecasting weather, particularly in the context of rapidly changing weather conditions due to global warming. It highlights the shift from traditional weather forecasting methods to...
Curated Video
The Thrilling History and Physics of Roller Coasters
This video explores the fascinating history and thrilling evolution of roller coasters. From their humble beginnings on mining tracks to the mind-blowing heights and speeds of modern coasters, viewers will discover the exhilaration and...
Curated Video
Controlled Burns: Safely Clearing Forest Hazards and Promoting Regeneration
Controlled burns are intentionally set fires conducted by professionals in the Forest Service to safely clear out hazardous wildfire fuel and promote forest rejuvenation. Scheduled during favorable weather conditions, these burns not...
Curated Video
The Science Behind Thunderstorms: Lightning and Thunder Explained
This video explains the formation of thunderstorms and how lightning and thunder are created. It describes how water vapor in the sky condenses into clouds, and when these clouds collide, electrical charges are produced. When these...
Curated Video
The Importance and Wonders of DNA: Exploring its Role in Life and Science
This video provides a brief and engaging overview of DNA and its significance in biology. It explains how DNA is the genetic material that determines the unique characteristics of living organisms, how it is passed down through...
Curated Video
Mummies: Unveiling the Ancient Egyptian Practice of Mummification
This video provides a fascinating look into the world of mummies, explaining the ancient Egyptian practice of mummification and its significance in their belief system. It highlights the incredible preservation of mummies, with a focus...
Curated Video
The Mighty Nile: A Lifeline for People, Plants, and Animals
The Nile River, the longest river on Earth, is a natural wonder that spans 11 countries. It has been a vital source of life throughout history, providing fresh water, food, and transportation. From its tropical rainforest headwaters to...