(Phys.org) —It’s been an exciting week in physics, first, scientists discovered how to turn light into matter after 80-year quest at Imperial College in London—turns out, Breit and Wheeler were right when they suggested back in 1934 that all it would take would be smashing two photons together. Another team of physicists showed unlimited heat conduction in graphene—they’ve demonstrated via simulations and experiments that the temperature conductivity of graphene deviates depending on the size of samples. Also, a team of researchers at CalTech has found a way of tricking the uncertainty principle—taking measurements that go beyond the limits imposed by quantum physics. And in a spectacular feat of applied physics, a one-nm-thick graphene engine mimicking a two-stroke engine has been developed by a team of researchers at the National University of Singapore. Instead of a piston, a spot on a sheet of graphene is heated till it blisters, then is allowed to cool so it goes flat again—over and over.