It Appears Time Travel is Tricky

So, as kids do, my nine-year old was playing inside a large box in the family room. He’d taken a large marker to the exterior and written “Time Machine” all over the box, with arrows pointing forward indicating +70 years into the future,  and reciprocated the -70 pointing backwards. When showing me his invention, Andrew made it very clear he needed his swimming goggles on to protect his eyes during actual time travel. Sure enough, he sat inside the box, swimming goggles in-place, preparing for what appeared to be a dangerous jump. I wished him a safe journey and headed off to a...