Why are we using tech from 100 years ago to deliver the world's electricity? Materials scientist Jason Huang shows how we could massively upgrade the global power grid by replacing the wires in existing transmission lines with new,...

There’s one kind of herpesvirus that’s specific to one species of primate, and each virus split off from the herpesvirus family tree when the primate split off from its own tree. But of course, humans are a special kind of primate.

The HIV & AIDS epidemic claimed countless lives in the 80s and 90s— and while it's still a devastating diagnosis, medical technology has made significant advancements in treating HIV. In the second video of our two-part series on HIV and...

Wheezy Waiter announces the SciShow nominees for "Worst Science in a Film," & Hank talks about the bird flu and shares two sounds that had never been heard by human ears until very recently.

Is Monkeypox truly as dangerous as the media says? The current human monkeypox outbreak has left many feeling uneasy about the potential of another pandemic. Whether it's fact or fiction, we'll show you what we know about Monkeypox in...

Hank talks about astrobiology - the study of and search for life in the universe off Earth. Right now, the field has more questions than answers, but all they all seek to answer that one fundamental query: are we alone in the universe?

Preventing mother-to-child HIV transmission is considered one of the most basic goals for curtailing the AIDS epidemic, and Nigeria is struggling mightily. In our series The End of AIDS, William Brangham and Jason Kane examine why this...

For the last eight years, pop singer Annie Lennox has devoted the majority of her time to her SING campaign, raising awareness and money to combat HIV/AIDS. She shares the experiences that have inspired her, from working with Nelson...

Dr. Angie Luis is here to tell Hank about wildlife that spread diseases to humans, and Jessi brings some wildlife that don’t.

While cases of Monkeypox are being found worldwide, the nature of the disease and the science we currently have available keeps concerns from growing.

In 2007, as the world worried about a possible avian flu epidemic, Laurie Garrett, author of "The Coming Plague," gave this powerful talk to a small TED University audience. Her insights from past pandemics are suddenly more relevant...

Two new versions of the coronavirus that causes COVID-19, the UK and South African variants, were announced in December. They've spread quickly in their countries of origin, and have begun popping up around the world. Join us to find out...

We’ve done a lot of searching for life in the universe and we need to continue to if we hope to make contact. But not all of our attempts were expected to succeed. That’s where Beacon in the Galaxy comes in.

Reuse of syringes, all too common in under-funded clinics, kills 1.3 million each year. Marc Koska clues us in to this devastating global problem with facts, photos and hidden-camera footage. He shares his solution: a low-cost syringe...

Germs are found on almost every surface we come in contact with, which makes it incredibly common for our bodies to be exposed to them. But why are some of these germs relatively harmless, while others can be fatal? Yannay Khaikan and...

Discover the science of how viruses can jump from one species to another and the deadly epidemics that can result from these pathogens. -- At a Maryland country fair in 2017, farmers reported feverish hogs with inflamed eyes and...

Hank scares our pants off with a tale of the five deadliest infectious diseases in the world.

In this video Paul Andersen explains how light can be absorbed, reflected, or transmitted as it moves from one medium to another. The reflection of different wavelengths creates the perceived color of an object. Absorbed light is...

SARS-CoV-2 is a new kind of coronavirus that appeared suddenly in late 2019. The disease it causes, called COVID-19, is now showing signs that it's able to spread outside of its place of origin. This raises some questions... like, do we...

There's a study coming out of the UK about using a steroid called Dexamethasone to treat COVID19 symptoms. The initial reports look good, but we'll hold judgement until we see the full study. Toilet plumes are also in the news....

A video titled "Signal Storage and Transmission" identifies how digital and analog signals are stored and transmitted.

Howcast - Learn how to use condoms correctly to protect yourself from sexually transmitted diseases from sexpert Jane Bogart in this Howcast video.

Howcast - Learn what sexually transmitted diseases you can get from oral sex from sexpert Jane Bogart in this Howcast video.

Howcast - Learn the top three sex myths about sexually transmitted diseases from sexpert Jane Bogart in this Howcast video.