Steve Clark reviewed What If? by Randall Munroe (What If?, #1)
Randall Munroe left NASA in 2005 to start up his hugely popular site XKCD 'a …
Review of 'What If?' on 'Goodreads'
5 stars
I love this book. Recommended for anyone who enjoys science. More at steemit.com/book/@steevc/silly-science