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.
If the notice is hand-delivered, be sure to get a signed and dated receipt. You are not required to state a reason for canceling the contract. Instead of using the Notice of Cancellation form, you also have the option of canceling the contract by sending a letter or telegram to the company within three days.