"An onion is similar to a tulip," explains journalist and author Mark Kurlansky. "It's a bulb that produces a flower, each layer is the food for a different shoot." But once the bulb has flowered, it's no longer good to eat. Onions are hardy, growing everywhere from the desert to the Arctic. It helps that they have a mechanism that was probably designed to protect them from mammals, Kurlansky explains. When you cut into an onion, it releases a gas that gravitates toward our eyes, making us cry. Kurlansky recommends wearing glasses or running a faucet to prevent tears.
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