SciShow News reports some promising new findings about the worldwide fight against HIV, including insights about how we can make the most of one of our newest weapons against HIV: circumcision.

For 10,000 years, humanity suffered from the scourge of smallpox. The virus killed almost a third of its victims within two weeks and left survivors horribly scarred. But Simona Zompi commends the brave souls - a Buddhist nun, a boy, a...

In order for a drug to be approved by the FDA, it must prove itself better than a placebo, or fake drug. But when it comes to medical devices and surgery, the requirements aren't the same. Placebos aren't required. That is likely a...

Howcast - Learn what it feels like to get a tattoo from the experts at Area 51 tattoo studio in this Howcast tattoo video.

Howcast - Learn what tests are needed before epilepsy surgery from Steve Wolf, MD and Patty McGoldrick, NP in this Howcast video.

Howcast - Learn about scalp reduction from hair transplant surgeon Craig Ziering, MD in this Howcast video.

Howcast - Learn about transplants into facelift and brow lift scars from hair transplant surgeon Craig Ziering, MD in this Howcast video.

Howcast - Check out part 8 of this walkthrough for the first person shooter, Battlefield 3, made by DICE, and find out how to beat "Going Hunting".

Howcast - Learn the pros and cons of having laparoscopic surgery to treat infertility in this Howcast video.

Howcast - Learn how testicular cancer can affect your sex life in this Howcast video.

Howcast - Learn about testicular cancer surgery in this Howcast video.

Howcast - Learn if thermage is an effective cellulite treatment from licensed esthetician Joanna Vargas in this Howcast video.

Howcast -Having a CT scan can be an unnerving experience. With the proper preparation and a clear head, you can get through it with minimal discomfort.

Howcast - Suffering from "man boobs" is no laughing matter to those who have them. Get that gynecomastia in check with the aid of modern medicine.

Howcast -Find out the four main risks of having a face-lift in this Howcast video featuring plastic surgeon Robert J. Morin, M.D..

Howcast -Find out if a face-lift will get rid of all your wrinkles in this Howcast video featuring plastic surgeon Robert J. Morin, M.D..

Howcast -Find out if insurance will cover your nose job if you have breathing problems in this Howcast video featuring plastic surgeon Robert J. Morin, M.D..

Howcast -Learn about butt lifts, also known as butt augmentation, from plastic surgeon Robert J. Morin, M.D. in this Howcast video.

Howcast -Find out about the three main risks of liposuction in this Howcast video featuring plastic surgeon Robert J. Morin, M.D..

Howcast -Find out the three main risks of breast implants from plastic surgeon Robert J. Morin, M.D. in this Howcast video.

Howcast -Learn about ear reconstruction surgery from plastic surgeon Robert J. Morin, M.D. in this Howcast video.

Howcast -Learn about chin implants (genioplasty) from plastic surgeon Robert J. Morin, M.D. in this Howcast video.

So like a true hero, you did the right thing: you registered to be a donor and put yourself in position to save someone's life. Now the call has come — time to spring into action, Hero!

Having noticeable breasts can be embarrassing, but it doesn't have to be permanent.