Review key inventions of the 19th and 20th centuries, from bicycles to the Underwood typewriter.
Firefly, 2012, 224 p., $29.95
Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.