Go ahead, worry about people who are always taking risks in life, going bungee jumping or hiking in the Himalayas. But while these people may end up in the emergency room now and again, being timid and fearful also has its costs—at least for rats.
Go ahead, worry about people who are always taking risks in life, going bungee jumping or hiking in the Himalayas. But while these people may end up in the emergency room now and again, being timid and fearful also has its costs—at least for rats.
