We’ve been trying to count the galaxies in the universe since the mid ’90s, but our estimates change as our tools improve. So what does our current estimate really mean? Find out in this episode of SciShow Space! [SciShow Space] Advertisements

Finding alien life on a distant planet would be amazing news – or would it? If we are not the only intelligent life in the universe, this probably means our days are numbered and doom is certain according to The Great Filter hypothesis. [Kurzgesagt – In a Nutshell]

A comparison in light years of some known galaxies. [MetaBallStudios]

In this video, Amy Shira Teitel of Vintage Space talks about how many rockets it took to bring Apollo to the moon. If you’re keeping track, that’s more than 83 engines and motors; you might have counted 87. There were actually 88 on the Saturn V, but five did nothing during an optimal mission. The […]

In this video from The Engineer Guy, host Bill Hammack reveals the operation and engineering design underlying the famous drinking bird toy. In this video he explores the role played by the water the bird “drinks,” shows what is under the bird’s hat and demonstrates that it can operate using heat from a light bulb […]

Some doctors have actually found a connection between having parasitic worms and not having immune system problems like allergies or arthritis. Find out more in this episode of SciShow. [SciShow]

Most of the cases we call “electrocutions” are actually electric shocks: an electric current running through a body. Whether an electric shock becomes an electrocution depends on the nature of the current involved. [SciShow]

When it comes to the flu, this year is a little problematic because of one very specific strain of the virus: H3N2. Watch this episode of SciShow to learn about why this year’s fly season might cause more problems than uual. [SciShow]