Beavers are busy indeed, but not eating fish: they are strict vegetarians. Their tails are good for many things, but not propulsion. Beavers do not harm fish. You’re thinking of an otter ripping into a struggling trout.
The truth about beavers
The truth about giant tortoises
Giant tortoises are a recent evolutionary innovation and used to be everywhere, not just on islands. It’s impossible to age them accurately unless you know when they hatched. They are actually pretty slow. The reason why the tortoises Darwin saw in Galapagos moved so fast was probably because he was chasing them and they were running away.
Getting Good Sleep: available now
Anyone who boasts that they do not need sleep is an idiot. Do not listen to them. In fact, improving your sleep is probably the single most effective step to improve your health. There is no health condition for which good sleep is not an effective prescription.
Check out my podcast for #HimalayaLearning on Getting Good Sleep.