Images: In Paris, the aircraft of the future

For those who want to get a taste of weightlessness now, a company called Zero Gravity offers the requisite parabolic flights in its specially decked-out Zero-G plane--seen here Wednesday at Le Bourget Airport, where the air show is taking place.

For more about Zero-G's flights, see "Photos: Stephen Hawking's zero-gravity flight."

Photo by SIPA