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 you want to cancel a credit agreement, the Consumer Credit Act gives you a 14-day cooling-off period to cancel the agreement. Cite the relevant legislation in all your correspondence with the trader when explaining you wish to cancel your contract.