On March thirteenth, Clyde Tombaugh and V.M Slipher announced the discovery of a new planet.

VOA: special.2010.07.11

Mister Tombaugh continued to record the motion of the new planet for thirteen years.

VOA: special.2010.07.11

New crust is created as melted rock pushes up from inside the planet.

VOA: special.2010.01.12

He lists three essentials for life on this tough new planet: food,energy and the Internet.

VOA: standard.2010.04.21

Author,educator and environmental activist Bill McKibben offers some advice in his new book on how to live on what he calls our "tough new planet."

VOA: standard.2010.04.21

His latest is "Eaarth: Making a Life on a Tough New Planet."

VOA: standard.2010.04.21

The League hopes it can convince skeptics that a vote for a new climate law will be good not only for the U.S.economy but for the planet as well.

VOA: standard.2010.02.25

On the the 40th anniversary of Earth Day, this warming planet we live on is posing serious new challenges to human civilization: increasingly severe droughts, floods,and storms across the globe, and slowly rising ocean levels.

VOA: standard.2010.04.21