
Asteroid deflection —
Extinction by asteroid probably isn't something that keeps most of us up at night. But it does at the B612 Foundation, a nonprofit set up by several former Silicon Valley execs to track and deflect asteroids on a collision course with Earth.

A private forest —
A billionaire British magazine publisher, Felix Dennis left the bulk of his $850 million fortune to care for his million-tree forest when he died last month, according to news reports.

Commercial flight —
The Guggenheim name is now synonymous with art, but in the 1920s the family that made its fortune in mining played a crucial role in advancing commercial air travel.

The National Parks —
His father was the founder of Standard Oil, a shrewd businessman and the richest American of all time. Junior, as John D. Rockefeller, Jr. was called, spent his life giving money away.

The United Nations —
In 1997, shortly after selling his cable empire to Time Warner, media mogul (and CNN founder) Ted Turner pledged $1 billion to the United Nations.

Doggie trust fund —
The billionaire New York hotelier left $12 million to her dog -- a Maltese named Trouble -- when she died in 2007.


