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.
In 2003, Carter revealed that her mother had suffered from irritable bowel syndrome for over 30 years, resulting in Carter touring the country as an advocate and spokeswoman. Lynda is also a staunch advocate and supporter of Susan G. Komen for the Cure, Pro-Choice rights for women, and legal equality for LGBT people.