By 2050 or so, the human population is expected to pass nine billion. Those billions will be seeking food, water and other resources on a planet where humans are already shaping climate and the web of life. Dot Earth was created by Andrew Revkin in October 2007 -- in part with support from a John Simon Guggenheim Fellowship -- to explore ways to balance human needs and the planet's limits.

The blog moved to the Opinion side of The Times in 2010 when Revkin left the Times staff to teach communication courses at Pace University. He won a National Academies Communication Award for Dot Earth in 2011 and Time Magazine named him one of the web's 25 top bloggers in 2013.

In December 2016, Revkin ended the blog and left Pace to return to full-time journalism as senior reporter on climate and related issues for the public-interest newsroom ProPublica.

Click here for a narrated slide show on the roots of Revkin's journalistic journey.