Or a single catastrophic sun flare burned the dinosaurs to death, while the mammals, with their built-in heat-adjusting apparatus, survived.

If the area had been overridden with ice," Dr. Heaton said, "no mammals would have survived there.

All but the most ephemeral organisms tended to live through at least one complete year, and the higher mammals survived longer.

Such incidents are a reminder that many marine mammals depend on their sensitive hearing to communicate, find food, mate and survive.

This is how mammals survive.

The giant mammals did not survive, however.

Although humans did help the mammal survive, we have found that our restrictive cages only deter release.

That figured, really- only mammals could survive that kind of climate.

Only in the north, in the foothills and the mountains, could the mammals survive.

It is to be hoped that the city's resourceful native mammals will survive even in reduced numbers.