According to Dr. Cooper why did the scientists not become aware of the penguin's ability of flight until just recently?

Can someone list any possible solutions to air pollution ?

Canada plays an important role in the global community in all of the following ways except by a. acting as a superpower with influence over europe and asia. b. promoting arms control and disarmament. c. working with the commonwealth of nations to promote trade. d. promoting trade with japan and other asian countries.

How many time zone are there on earth