Ars Technica: The use of a new pointing and tracking system has allowed researchers in China to teleport multiple entangled photons 97 km. That distance marks a significant improvement in the two years since open-air quantum teleportation was first demonstrated. The open-air process retains more photons than does its fiber-optic equivalent. Aligning the receiver is difficult, though, because ground settling, tectonic shifts, atmospheric turbulence, and even the moon’s gravitation can affect the transmission beam. To counter some of those effects, the researchers performed the teleportation over the surface of Qinghai Lake and only at night.