It is amazing how much scientists have changed our lives in the last 100+ years. Penicillin. Atomic energy. Spaceships. Computers. AC electrical current. The Internet. DNA sequencing.

And how our understanding of the world and universe has changed during the same time period. Einstein. Hawking. Tesla. Bohr. Sagan. Pauling. Gould. Sanger. This book highlights 28 scientists who changed our world, most primarily in the 20th century. They are arranged in alphabetical order, as I’m not crazy enough to try to rank them.