In today's episode of Boing Boing tv, we float around in zero gravity. With me on this Zero-G weightless flight are Intel Chairman Craig Barrett; my friend Sean Bonner from metblogs; and a bunch of science teachers from grade schools and high schools throughout the United States who were on board to conduct microgravity experiments for the kids back home. As you watch, keep an eye out for the floating lego robot, a flying pig, and the barfing guy who is totally barfing for reals -- the rest of us did not, btw, I don't get sick in space.

What you see in this episode is what it feels like, guys, and it feels awesome. -- Xeni Jardin. (Special thanks to Peter Diamandis, and George and Loretta Whitesides)

Astronaut and space hero Dr. Buzz Aldrin speaks with Xeni about his belief that America -- and that means you! -- must return to the moon, and soon. His nonprofit, Sharespace.org, seeks to provide "affordable space travel opportunities for all." Buzz believes that commercial space vacations should not be available only to the wealthy elite.

Editor's note: the comment trolls really are taking over around here. One of them invades this very BBtv episode. Teresa, why doesn't disemvowelling work in video? We'll have to get our hamster-engineers right on that. (cameo by BBtv Production Assistant Rob Bergsma)

Today on Boing Boing tv, Xeni is joined by astronaut and American hero Buzz Aldrin, Virgin Galactic founder Sir Richard Branson, Scaled Composites founder Burt Rutan, and other space luminaries for an exploration of private space travel -- the technology, the science, and the human experience.

We fly to the Mojave spaceport to witness the unveiling of WhiteKnightTwo carrier aircraft that will carry SpaceShipTwo and passengers on Virgin Galactic suborbital space flights.

Related: All about "Eve": Virgin Galactic mothership unveiled.

Today on Boing Boing tv, Xeni and Pesco dive deeper into the magical chocolate factory founded by a NASA software developer.

In this installment of BBtv's 3-part series on TCHO Chocolate, we learn more about the hacked-together, home-tinkered machines and high-tech wizardry that keep the factory running. The philosophy is "scrappy, not crappy," as founder Timothy Childs explains.

TCHO's R&D lab contains such diverse components as Space Shuttle tape, a modded RONCO turkey oven, stone grinders used in Indian restaurants, and deconstructed space heater parts from the local hardware store.

Next, we zoom in to the molecular-level science behind this most delicious confection. Science buffs, rejoice! This episode is as fun for your eyes and brain as the "obsessively good" chocolate is for your mouth -- Polymorph fun for the whole family. Warning: this episode is NSFC (not safe for chocoholics).

Previously on Boing Boing tv:
* TCHO, part 1: chocolate origins.

Related: read a feature about TCHO by David Pescovitz in the current issue of MAKE Magazine, Timothy and the Chocolate Factory.

Here are some iPhone snapshots from Xeni on Flickr: TCHO, Boing Boing tv.

(Special thanks to Amy Critchett, and Wayne & Breanna)