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?

If you've ever given your pet an anti-flea and tick medicine, you may have wondered why there's not a similar drug out there for you. Here's a little dive into the history of these drugs, and why there may someday be a human-grade...

There’s a deep connection between gravity and time - gravitational fields seem to slow the pace of time in what we call gravitational time dilation. And today we’ll explore the origin of this effect. And ultimately, we’ll use what we...

If you’ve ever been scratching a dog and seen them do the kicky leg thing, it’s truly adorable. But it might not necessarily be a feel-good thing.

You probably know that Australia is famous for giant snakes and spooky spiders... but oh... there's SO much more. Join Hank Green as he shows you seven truly terrifying Australian inhabitants that you might not have heard of—and some are...

Mosquitoes transmit a number of terrible diseases like malaria, West Nile virus, and the Zika virus, but why not the flu?

This week, scientists revealed a sample of amber containing an extinct tick that fed on dinosaurs. Unfortunately, we can't take a blood sample from it and make Jurassic Park a reality, but it can still tell us a lot about how dinosaurs...

This video is about the definition of a day, and how it applies (or not) on the sun. Solar day, sidereal day, universal coordinated time (UTC) day, etc. Length of a day.

If you've spent any time on the internet, you know that Australia is host to all sorts of horrible spiders and snakes. But that doesn't even begin to cover the myriad of dangerous, sometimes deadly, plants and animals you...

Blood-suckers may seem like they have it easy, but feeding on blood comes with a lot of challenges.

This video is chapter 2 in my series on special relativity, and it covers spacetime diagrams, rotational and translational symmetry of both time and space, how certain transformations preserve distances (measured in terms of a...

It seems like the easiest way to avoid tiny parasites is to just slap on your animal’s tick or flea collar and hike into the woods worry-free. But you definitely shouldn’t.

If you’ve ever been scratching a dog and seen them do the kicky leg thing, it’s truly adorable. But it might not necessarily be a feel-good thing.

In 1967, researchers gathered to answer a long-running scientific question: just how long is a second? It might seem obvious at first. A second is the tick of a clock, the swing of a pendulum, the time it takes to count to one. But how...

Introducing our new channel: SciShow Psych! The topic was chosen by our Patreon patrons towards the end of last year and we're super excited that it's finally a thing!

Thanks to observations of galaxy redshifts, we can tell that the universe is EXPANDING! Knowing that the universe is expanding and how quickly its expanding also allows us to run the clock backwards 14 billion years to the way the...

Thanks to the University of Minnesota for sponsoring this video!

Lyme disease is spreading like wildfire around the world: here's...

Find out why these arachnids are among the least B of humanity's BFFs. Yeah, they're blood-sucking parasites, but that's not all of it!

These are the five ticks you need to worry about this tick season! Keep those pants rolled down, and make sure you don't take any of these parasites home with you while you're out in the wild.

Howcast - Learn popping in this Howcast dance video with choreographers Jamal Cumberbatch and Searich Wilson Hong.

Howcast - Learn how to do the ticking hip-hop dance move from choreographer Matt Steffanina in this Howcast dance video.

Howcast - Learn how to do the Jerry Springer in reggae dancehall from the founders of Str8FramYaad Dancehall Aerobics in this Howcast dance video.

Howcast - Learn how to do ticking in reggae dancehall from the founders of Str8FramYaad Dancehall Aerobics in this Howcast dance video.

Howcast - Learn how to do pop and lock dime stopping in this street dance video from Howcast.