Most axons of vertebrates are enclosed in a myelin sheath, which increases the speed of impulse transmission; some large axons may transmit impulses at speeds up to 90 metres (300 feet) per second.
Lynda Carter Wonder Woman's STILL SUPER HOT. 61-year-old Lynda Carter -- famous for playing Wonder Woman on the '70s show -- must really have super powers ... because she's still scorchin' hot.
Looking great: Lynda Carter showed off her Wonder Woman figure as she headed to a TV interview in New York, on Tuesday. Crime fighter: Even after 40 years since she played the iconic hero Lynda still looks the part.