Niels and Erwin, Schrödinger's double quantum cats
One cat can be dead and alive at the same time, this much we know since Erwin Schrödinger the quantummechanic. Delft physicists Diego Ristè, Gijs de Lange, Leo DiCarlo and colleagues did it to two cats (actually superconducting circuits in ultracooled microwave cavities). They can now entangle their cats Niels and Erwin at will. A result worthy of Nature. Delft University of Technology asked me to make this animation about it.