![Amazon.com: Puzzling Evidence: 9780975958117: Greg Giacona, Magic Sam Shanahan, Nicholas Giacona, Amanda Heinen: Books Amazon.com: Puzzling Evidence: 9780975958117: Greg Giacona, Magic Sam Shanahan, Nicholas Giacona, Amanda Heinen: Books](https://m.media-amazon.com/images/I/618iFOzgyAL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Puzzling Evidence: 9780975958117: Greg Giacona, Magic Sam Shanahan, Nicholas Giacona, Amanda Heinen: Books
Justin Osterstrom on Twitter: "Started these past two days learning and digging into Wegener's work about continental drift. Great starting point with plate tectonics and getting back into the swing of things. #
![USGS on Twitter: "Wegener's Puzzling Evidence Exercise - continental drift leads to theory of plate tectonics https://t.co/T1b2Od1nYW https://t.co/lqKinBX8LC" / Twitter USGS on Twitter: "Wegener's Puzzling Evidence Exercise - continental drift leads to theory of plate tectonics https://t.co/T1b2Od1nYW https://t.co/lqKinBX8LC" / Twitter](https://pbs.twimg.com/media/CXAKh6kUoAA622F.png)
USGS on Twitter: "Wegener's Puzzling Evidence Exercise - continental drift leads to theory of plate tectonics https://t.co/T1b2Od1nYW https://t.co/lqKinBX8LC" / Twitter
![Amazon.com: Puzzling Evidence: 9780975958117: Greg Giacona, Magic Sam Shanahan, Nicholas Giacona, Amanda Heinen: Books Amazon.com: Puzzling Evidence: 9780975958117: Greg Giacona, Magic Sam Shanahan, Nicholas Giacona, Amanda Heinen: Books](https://m.media-amazon.com/images/I/61oU3Ff9w-L._AC_UF1000,1000_QL80_.jpg)