Drinking Rain and Evolving Apes

Can we drink rain water? Why do dogs prefer drinking out of the toilet? Why haven't all apes become humans? We tackle these questions this week on Ask the Naked Scientists, as well find out how big the earth would look from the moon, why it gets so cold just before dawn, why some plants have red leaves and why our body fails to heal scars. Like this podcast? Please help us by supporting the Naked Scientists Like this podcast? Please help us by supporting the Naked Scientists