Letters to the Future An Essay from Field Notes on Science and Nature by John D. Perrine & James L. Patton The lapse of many yearsThe Grinnell SystemJim's systemJohn's systemRecord them all+3 More
Contrafreeloading A Definition en.wikipedia.org Contrafreeloading is an observed behavior in which an organism, when offered a choice between provided food or food that requires effort to obtain, prefers the food that requires effort. workbehavior