The third installment of this innovative science news and magazine series features Tom and Ray Magliozzi, Peabody Award-winning hosts of "Car Talk" on NPR, who join host Robert Krulwich to explore what could be the wave of the future: fuel cells.

Tuesday, 7/31/07 from 8-9 p.m. and 1:30-2:30 a.m. ET
Friday, 8/3/07 from 4:30-5:30 a.m. ET