Scientists Close In On Mass Killer Of Life On Earth

From McClatchy:

WASHINGTON — It was the greatest mass murder of all time — poison everywhere! billions slain! — but the killer or killers have never been positively identified.

An estimated 95 percent of all marine species and up to 85 percent of land creatures perished, according to Peter Ward, a paleobiologist at the University of Washington in Seattle.

Scientists call it "The Great Dying." Life took millions of years to recover.

Scientific sleuths, however, now think they're making progress toward pinning down what caused the extinction of most plants and animals on Earth some 251 million years ago.

Read more ....