Scientists accidentally kill world's oldest animal at age 507. The oldest animal ever known lived from 1499 until the day researchers cracked its shell open, killing it in the process.
For example, there is a federal law (and similar laws in every state) allowing consumers to cancel contracts made with a door-to-door salesperson within three days of signing. You might use that law after hastily agreeing to have someone repave your driveway, deliver lawn fertilizer, or put a new roof on your house.
The Truth in Lending Act, the Federal Trade Commission's cooling-off rule and numerous state buyer's remorse laws offer ways to cancel some signed purchase contracts within three to five days. Although qualifying purchases vary by law, the process for legal cancellation is much the same regardless of the law that applies to a given situation.