"A lucid and engaging account of the scientific revolution that changed the way we think about our planet and ourselves."—James Lawrence Powell, author of Gra

"Radioactivity is like a clock that never needs adjusting," writes Doug Macdougall. "It would be hard to design a more reliable timekeeper." In Nature's Clocks,

Clear and accessible introduction to the concept of time examines measurement, historic timekeeping methods, uses of time information, role of time in science a

Pulsars are rapidly spinning neutron stars, the collapsed cores of once massive stars that ended their lives as supernova explosions. In this book, Geoff McNama

What is time? When did we first use it? Does it always work? How do animals tell time? A fun and fascinating look at time from the first calendars and clocks to