NEW YORK TIMES BESTSELLER • In the final book of his astonishing career, Carl Sagan brilliantly examines the burning questions of our lives, our world, and the universe around us.
These luminous, entertaining essays travel both the vastness of the cosmos and the intimacy of the human mind, posing such fascinating questions as how did the universe originate and how will it end, and how can we meld science and compassion to meet...

"A bold exploration of the reintegration of rationality and intuition, science and soul, to foster individual and planetary healing. Examines how integrating important alchemical images with Gaian science can offer insights into our interconnectedness with Gaia. Looks at how the four components of the living earth-biosphere, atmosphere, hydrosphere, and lithosphere-mesh with the four elements of alchemical theory and the four functions of consciousness...

Millions of people visit xkcd.com each week to read Randall Munroe's iconic webcomic. His stick-figure drawings about science, technology, language, and love have a large and passionate following. Fans of xkcd ask Munroe a lot of strange questions. What if you tried to hit a baseball pitched at 90 percent the speed of light? How fast can you hit a speed bump while driving and live? If there was a robot apocalypse, how long would humanity last? In...

"The #1 New York Times-bestselling author of What If? and How To provides his best answers yet to the weirdest questions you never thought to ask. The millions of people around the world who read and loved What If? still have questions, and those questions are getting stranger. Thank goodness xkcd creator Randall Munroe is here to help. Planning to ride a fire pole from the moon back to Earth? The hardest part is sticking the landing. Hoping to cool...

The bestselling editor of This Explains Everything brings together 175 of the world's most brilliant minds to tackle Edge.org's 2014 question: What scientific idea has become a relic blocking human progress? Each year, John Brockman, publisher of Edge.org--"The world's smartest website" (The Guardian)--challenges some of the world's greatest scientists, artists, and philosophers to answer a provocative question crucial to our time. In 2014 he asked...