There was great fanfare when the Mars Science Laboratory launched in November 2011, and again when its precious cargo — NASA's Mars rover Curiosity — touched down on the red planet in August 2012.
The eight months in between had drama of their own. Curiosity was constantly bombarded with radiation as it traveled through space — high-energy protons thrown out by the sun, and galactic cosmic rays slicing through the solar system from distant supernovas.
Sometimes the most powerful and transformative technologies emerge by accident, an unintended consequence of other developments. When this happens, the scope and power of the new technology can't be fully appreciated until after we have embedded it in our culture.
Retired Gen. David Petraeus is headed to Wall Street where he will join Kohlberg Kravis Roberts, a firm that invests globally in everything from real estate to coffee to biotech.
Over nearly four decades in the military, Petraeus traveled the world on diplomatic and intelligence missions. Even then, he says in a video posted Thursday on KKR's website, he occasionally viewed these trips through an investor's lens.