It is a record that now stretches back over 40 years - an invaluable tool for studying our changing world.

BBC: Lift-off for latest Landsat mission

What is clear is that this platform is becoming an ever-changing financial tool for artists, nonprofits, entrepreneurs and small businesses alike.

FORBES: Connect

Significantly increasing the fraction of skilled immigrants allowed into the U.S. without changing the overall number of immigrant would be a powerful tool in reducing U.S. inequality and stimulating economic growth.

FORBES: Want To Reduce Income Inequality? Lower The Barriers To Talented Immigrants

Mobile phones are changing the way we learn and have increasingly become a powerful tool for accessing information such as literacy training, educational and employment opportunities.

UNESCO: Education