Almost 13,000 years ago, a vast, hurtling fragment of a comet exploded over Louisiana, turning stone into glass, and it could offer evidence to support a controversial scientific theory.
Almost 13,000 years ago, a massive fragment of a comet exploded over Louisiana, turning stone into glass and potentially offering evidence for one of history's most controversial theories.
New research supports ideas popularized by author Graham Hanc... [5571 chars]