Whether age, climactic change or just bad luck set off the tree's demise may never be known.

It described an earth that had been bombarded with meteorites large enough to cause catastrophic climactic changes.

In addition to commercial hunting, the whale is threatened by climactic changes such as the destruction of the ozone layer protecting Earth from the sun's ultraviolet rays.

How lasting will that climactic change prove?

Q. What are some of the predicted climactic changes going to mean?

But they never make the climactic change, and the sagas continue.

Hugh Montgomery of The Observer criticized the album's "usual...over-production, ersatz yearning and (anti-)climactic key changes."

The time scale is so long that it probably includes climactic changes including ice ages.

Scientists believe the spread may be linked to natural changes in the chemistry of the environment, climactic change or pollution.

When these boys reach that climactic change of voice, we are told, their musical education continues and they are returned to the choir as mature members.