More than 34 million people live with HIV/AIDS worldwide. Only one person has, apparently, been cured of the virus. As the International AIDS Conference returns to the U.S. for the first time in more than 20 years, we speak with two individuals: the man known in some research circles as "the Berlin Patient," and one of the California researchers trying to replicate his HIV cure using gene therapy.

Imagine you're a scientist, trying to cure brain cancer. One thing you'd probably want to be sure of is that the samples you're working with actually came from a brain tumor, and not some other kind of cancer. This sounds like a simple problem to solve, but it's been nagging scientists for years, causing the waste of precious research dollars.

Blind people are consistently underrepresented in the workforce, but especially in the sciences. Experts say that's partly due to the fact that so much of early science education -- from labs and dissections to the periodic table of the elements -- is learned through visual-spatial lessons. The Lighthouse for the Blind held a first-ever chemistry camp for blind kids. The goal was to engage blind kids in the sciences by teaching chemistry through other senses, like touch and smell.

Earlier this month, NASA launched a new telescope into space to search for black holes. Scientists on the ground at UC Berkeley are communicating with it, and as Lauren Sommer reports, they're hoping to solve some of the mysteries around these strange space oddities.