The equations of physics suggest time should be able to go backwards as well as forwards. Experience suggests, though, that it cannot. Why? And is time travel really possible?
FO3_x7TCNfssabine-time-can-run-in-two-directions-new-research-findsSabine | Time Can Run in Two Directions, New Research FindsWhy time passes is one of the biggest mysteries in physics, as the fundamental laws of nature don’t reflect a difference between moving forward and backward in time.
Civvmy4dIg8be-inspired-scientists-just-proved-the-past-can-changeBe Inspired | Scientists Just Proved The Past Can ChangeWhat if the past isn’t fixed? Scientists have just proven that the future can influence the past, shattering everything we thought we knew about time and reality.
2eXyrJUSdq8fexl-the-paradox-of-time-that-terrifies-scientistsFexl | The Paradox of Time That Terrifies ScientistsBut the effects of time dilation are still visible today. When we look at distant galaxies, we’re seeing them as they were billions of years ago—closer to the time of the Big Bang.
Wbd1-lFkKQ4how-can-space-and-time-be-part-of-the-same-thingHow Can Space and Time be part of the Same Thing?What is Spacetime? Are space and time the same thing?
OV9MnAZLmMQwhats-your-brains-role-in-creating-space-timeWhat’s Your Brain’s Role in Creating Space & Time?Physics is the business of figuring out the structure of the world. So are our brains.
5vOU6-1yNZsjourney-through-the-universe-beyond-the-speed-of-lightJourney through the Universe beyond the Speed of LightSomewhere, far away, if you believe what you read, there's a hole in the Universe. There's a region of space so large and empty, a billion light-years across, that there's nothing in it at all.
yPVQtvbiS4Ywhat-actually-are-space-and-timeWhat Actually are Space and Time?History of the Universe | I’ve literally started pursuing graduate degrees in physics because of this channel.
xjQDKGxPjakscientists-reveal-how-time-travel-is-actually-possible-2022Scientists Reveal How Time Travel Is Actually Possible (2022)Is it actually possible to travel through time? Scientists say "Yes", but what does that actually mean?
hzLTgtFaPLYbloomberg-atomic-clocks-are-reinventing-time-2021Bloomberg | Atomic Clocks are Reinventing Time (2021)Though humans don't experience it in their daily lives, gravity and movement can change how time elapses.
PdL8CudJTcssabine-hossenfelder-is-time-realSabine Hossenfelder | Is Time Real?In this video I explain why some physicists argue that time does not exist, and what that even means. Correction: The photo at about 1 mins doesn't show Hermann Minkowski (who is the one I meant) but his brother Oskar. Sorry about that.
sj2AAJnex9Mwhat-particles-does-time-consist-ofWhat Particles does Time consist of?Random facts: A thousand seconds is about 16 minutes. | A million seconds is about 11 days. | A billion seconds is about 32 years.
M7RMnpiUrfEspacerip-when-will-time-end-2020SpaceRip | When Will Time End? (2020)The answer to this question may depend on whether Stephen Hawking was right in his theory that describes how black holes shed mass and eventually decay. Time is flying by on this busy, crowded planet as life changes and evolves from second to second.
2w22CBE_9GIcool-worlds-traveling-back-in-time-2019Cool Worlds | Traveling Back in Time (2019)Is it possible to go backwards through time? We travel forwards every day, but traveling back could let us change our past, visit old friends, or manipulate the timeline to our benefit...
Yhzz47J0trojoe-scott-what-is-time-2019Joe Scott | What is Time? (2019)Time is something we experience every day, and it seems like something we'd be familiar with. But when you dig into it, it gets weird. So what exactly is it? And how does it work?
MAScJvxCy2Ysean-carroll-what-is-timeSean Carroll | What Is Time?What is Time? Tackle one of the greatest problems in all of science - the nature of time itself - in "Mysteries of Modern Physics: Time," a groundbreaking course by Dr. Sean Carroll, one of the foremost researchers in this field.
ZyYqyYAKGC0sneak-peek-time-is-but-a-stubborn-illusion-2017Sneak Peek | Time Is But a Stubborn Illusion (2017)Watch an exclusive sneak peek from the first episode of Genius, starring Geoffrey Rush as the older Einstein and Johnny Flynn as the younger.
aw_H4Hte0ykrobert-matthews-the-true-nature-of-time-2015Robert Matthews | The True Nature of Time (2015)Theories of science have ignored time… until now. A new idea reveals how it created the Universe - and you, writes Robert Matthews.
YycAzdtUIkopbs-space-time-are-space-and-time-an-illusion-2015PBS Space Time | Are Space and Time An Illusion? (2015)This episode of Space Time is actually about Spacetime, so pull up a chair, grab your favorite snack, and buckle up, because this episode is going to be a TRIP.
MTx6ha6fRwodr-michio-kaku-bbc-time-1-daytime-2010Dr. Michio Kaku | BBC Time | 1: Daytime (2010)In this four-part series, string theory pioneer Michio Kaku goes on an extraordinary exploration of the world in search of time.