Titanic sinking not only human folly
Washibgton - After a century that included two high-profile government investigations and many books and movies, Americans still are debating what really caused the "unsinkable" Titanic to hit an iceberg and sink on that crystal-clear chilly night.
Now come two new theories that suggest freak atmospheric conditions could have caused a mirage or an even rarer astronomical event that sent icebergs into shipping lanes.
Disaster experts and Titanic historians say the effort to find natural causes may also be a quest for an excuse - anything to avoid blaming human folly and hubris for the disaster that claimed 1 500 lives.
The doomed cruise ship went down 100 years ago this week.