Humans have interrupted a lot of natural processes. Highways divide forests, and dams interrupt the migration routes for fish. But that isn't to say that we haven't found solutions to some of the problems that we created. Wildlife bridges have been built over highways allow animals to cross the highway safely. And in a recent Twitter storm, the public has rediscovered an amazing apparatus that scientists released in 2014 which helps salmon migrate. It is called the Salmon Cannon. And as you can imagine, everyone is obsessed with it.