Could LSD be the next drug in your doctor's arsenal? New experiments have a few researchers believing that this "trippy" drug could become a pharmaceutical of the future, thinking it may enhance brain power, expand creativity, and cure disease.

Outlawed in 1970, the street drug developed a reputation as the dangerous toy of the counterculture, capable of inspiring either moments of genius or a descent into madness. Now, National Geographic takes a fresh look into this psychedelic world, including the first human LSD trials in more than 35 years.  (50  minutes)