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Scientists have difficulty determining the age of these behemoths, though — they stop forming rings and often have large, hollow interiors ... spaces between fused stems disposed in a closed ...

Q: The broccoli I grew in the fall had hollow stems. What causes this, and how can I keep this from happening? Answer: Broccoli is a cool season vegetable in the Brassicaceae family of plants ...

There have been cases of children using the hollow stems as whistles, leading to death. Dead stems can contain poison for up to three years. While the amount of poison can vary between plants ...