The Olympic sprinting great called the experience "mindblowing."
International Space Station scientists will determine how well the sperm perform in zero gravity.
"Today we get to try some tricks that we've only ever dreamed about," the skateboarding legend said.
We all need help maintaining our personal spiritual practice. We hope that these Daily Meditations, prayers and mindful awareness
GRAVITY // UN RÊVE DE DEMAIN from Filip Piskorzynski on Vimeo. Most directors wouldn't want their creations to lack gravity
"This business consists of riding bombs. And if you do absolutely everything right, you can marshal the energy to do something astonishing like put yourself into orbit. If you do even a few things wrong, it's going to act like a bomb."
In Russia, you can experience simulated bursts of weightlessness (parabolic flight) in an old Ilyushin 76 cargo plane -- the same aircraft in which Russian cosmonauts train.