Proof-of-work mining (the type of mining used for Bitcoin and other cryptocurrencies) has some negative environmental impacts… as do the systems behind most other mediums of exchange.
Tools are any object (typically a physical object) that can be used by a life form (typically a human) to perform a function. This includes instruments used for the sciences, machines, equipment, devices, and more. For the purposes of FactMyth.com this section is a “catch-all” for usable objects so this includes all tools, objects, and inventions not strictly meant as art.
Carl Sagan and NASA gained popularity when the longtime space program scientist created the Pioneer plaque and the Voyager Golden Record to be sent to space.
When the plutonium bomb to be dropped on Nagasaki was tested, the Manhattan Project scientists made a bet on whether or not it would destroy the world.
Isaac Newton produced many well-known works in math, astronomy, and physics, but he produced about as many unpublished works which dealt with theology, alchemy, and the occult.