Recently I read about a biosphere where a group of scientists had created a perfect environment to grow certain plants and trees. One thing they found was that the trees in this environment—complete with the perfect soil, amount of sunlight, and watering—grew up at a rapid pace. But then they fell over. They set out to discover why that happened, and I thought their conclusion was fascinating. Why did they topple over? There was no wind in the biosphere and so the trees were never tested.

