1. 2010 marked the 40th celebration of Earth Day, a holiday that helped spark America’s modern environmental movement when it was founded on April 22, 1970, by then-Sen. Gaylord Nelson of Wisconsin. In honor of that historic day, MNN produced this quick look back at the last four decades of planetary appreciation.

  2. We sure could use your vote!

    MNN’s AT&T video is a finalist in the Center for Corporate Citizenship’s annual film festival. We’d appreciate it if you’d give AT&T a vote!