The Great Dying

The Great Dying: "The Great Dying
250 million years ago something unknown wiped out most life on our planet. Now scientists are finding buried clues to the mystery inside tiny capsules of cosmic gas.


NASA

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see captionJanuary 28, 2002: It was almost the perfect crime.

Some perpetrator -- or perpetrators -- committed murder on a scale unequaled in the history of the world. They left few clues to their identity, and they buried all the evidence under layers and layers of earth.

The case has gone unsolved for years -- 250 million years, that is."