Science Carl Sagan: How the circumference of the Earth was calculated using only sticks, eyes, feet, and brains Ruben Bolling

NASA NASA official takes oath of office with hand on Carl Sagan book David Pescovitz

Science A Carl Sagan documentary is coming from Nat Geo & Seth MacFarlane Rusty Blazenhoff

space exploration Could Voyager 1's camera be turned back on? Gareth Branwyn

star wars In 1978 Carl Sagan told Johnny Carson the big problem with Star Wars: "They're all white" Mark Frauenfelder

environmentalism Today is Earth Day. Watch this message from Carl Sagan. David Pescovitz

art Cool collaborative student animation of Sagan's "The Pale Blue Dot" speech Andrea James

Grand theft auto Carl Sagan + Grand Theft Auto Mark Frauenfelder

Science Star Stuff: Carl Sagan and the Mysteries of the Cosmos Wink

offworld Did you know Carl Sagan designed a game? Critical Distance

Science Source of famed Wow! signal likely found Gail Sherman

Space NASA simulation takes you into a black hole Gail Sherman

Science Linda Salzman Sagan, co-creator of the Voyager Golden Record and Pioneer Plaque, RIP David Pescovitz

science fiction Watch the first trailer for 3 Body Problem on Netflix Thom Dunn

Environment Carl Sagan: a lovely and powerful new short film and automaton installation about the urgency of environmental action (video) David Pescovitz

Entertainment Voyagers is a forthcoming film about Carl Sagan and Ann Druyan's romance making the Voyager Golden Record David Pescovitz