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.
Lynda Carter. Friday 10 September 2010 19.02 EDT First published on Friday 10 September 2010 19.02 EDT. I watch myself getting older, and it's odd to see all the little lines creeping in, but that's part of life.