Lake and stream invasions of rusty crayfish, Orconectes rusticus, provide excellent opportunities to examine morphological variation in habitats differing in water velocity. Spread of O. rusticus and displacement of resident species in lakes has been attributed to larger mean body and chelae sizes than for native species, but larger body and chelae sizes may not be advantageous in high-velocity environments.
Apr 04, 2017. 1  Sir Ian McKellen has revealed why he never took on the role of Albus Dumbledore in the Harry Potter movies. 2  The 77-year-old English actor â known for playing Gandalf, another famous and bearded wizard from Lord of the Rings â said he was contacted by producers from Harry Potter to play Dumbledore, but turned down the part. His reason: Richard Harris, who played Dumbledore in the franchise before his death in 2002.
Best known as America's alluring dream girl from her days as Winnie Cooper on The Wonder Years (1988), Danica McKellar made her breakthrough at the early age of 12. After that show ended, she went on to graduate Summa cum Laude from UCLA with a degree in Mathematics, and even proved a new math theorem, the Chayes-McKellar-Winn Theorem. Since returning to acting, Danica became familiar again to audiences from her year-long turn as the sardonic, dry-witted Elsie Snuffin on The West Wing (1999) in its 4th season.