Before the PETM, Nunes and Norris found, surface waters sank principally in the southern hemisphere, with deep currents then flowing north.

BBC: NEWS | Science/Nature | Past gives clue to climate impact

This time I had a "brain pacemaker" installed, which uses wires and a battery source to stimulate deep parts of the brain with electric currents.

CNN: 'I had brain surgery while I was awake'