The modern battery has come a long way in its 224-year history. In the place of Alessandro Volta’s piles of metal disks and brine-soaked cloth, we now have batteries the dimensions of a graham cracker that can last days before needing a recharge.
The quantum world operates by different rules than the classical one we buzz around in, allowing the fantastical to the bizarrely normal. Physicists have described using quantum entanglement to simulate a closed timelike curve—in layman’s terms, time travel.