Film/T.V: Who has played Ken Barlow in coronation street since 1960?

Questions

The pronghorn ---------- is the fastest mammal to be found in North America, and second only to the cheetah as the fastest mammal on the planet.?

The flying ---------- of Java and Malaysia is able to flatten itself out like a ribbon and sail like a glider from tree to tree.?

Tunas will suffocate if they ever stop ----------. They need a continual flow of water across their gills to breathe, even while they rest.?

The pupil of an octopus's eye is ----------?

The ---------- bird can fly at a speed of 260 miles per hour.?