The billionaire founder and CEO of the Carlyle Group on his mission to repay America for everything it's given him
A new study shows that conservation efforts in the Brazilian Amazon are linked to lower rates of some diseases.
Farah Pandith cites Jane Goodall as a figure who helped her learn the value of different perspectives.
Oslo officials pledge to ban cars from the city's downtown area by 2019.
Would you pay 25 cents to smash one of Jeff Koons’s enormous balloon animal sculptures? Artist Hunter Jonakin explores this violent fantasy with an arcade-style video game.
Can we engineer new ones in time?
Readers reflect on the lessons of a grieving whale