ABSTRACT
Two Canadian backpackers encountered a grizzly bear on their trek through the woods. Immediately one of them removed his pack, and as quickly as possible put on his running shoes. The other stood in amazement and said ‘That is no good, the grizzly can run a lot faster than you.’ ‘Ah’ said his friend, ‘but I don’t have to run faster than the bear, I only have to run faster than you.’ https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780203746448/1e8e45c6-ed55-43d1-99c8-6dfbf35b6d0e/content/fig261_1.jpg" xmlns:xlink="https://www.w3.org/1999/xlink"/>
