Grant Rightmyer, Age 13, Of Peterborough, Ont., Canada. For his question:

When did the last passenger pigeon die?

The last of the passenger pigeons departed from this world in the year 1914.. For years the lone survivor had been a resident of the zoo in Cincinnati, Ohio. In the last century the famous bird expert, J.J. Audubon., had observed flocks of American passenger pigeons in fabulous numbers. He estimated that a billion of them passed by his observation post in three hours.

At one time the vast flocks were past counting. The nesting regions, often with 100 nests in a tree, often covered areas of 100,000 acres. But the dove like birds were slaughtered without mercy, and in a few short generations man the hunter destroyed them all.  There will never in all eternity be passenger pigeons in the world again.