Earth Day is held on April 22 with this year’s being the 55th anniversary of the first in 1970. It began during a time of great public protest in this country due to the Vietnam War, the Nixon ...

The famed astrophysicist Carl Sagan ... alive today. Sagan was instrumental in the climate movement in the 1980s, raising concerns of global warming in Congress. In 2025, the earth’s existence ...

The Carl Sagan Center for Research (CSC ... ranging from observing and modeling the precursors of life in the depths of outer space to studies of Earth and its rich biological history. Many SETI ...

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Carl Sagan, the astronomer, Pulitzer Prize-winning author, and legendary popularizer of science, gave this interview during the making of "Time Travel." True to form, he discusses arcane aspects ...

Carl Sagan spent his childhood immersed in Mars ... of color—Burroughs’s Mars had two more primary colors than Earth—with removable heads but decidedly human forms.