However the researchers can? T be absolutely sure that the two signals they measured were dark matter and not some other particle, which they call background.
Although Capello spoke in conditional terms last week about his continued involvement with England after the World Cup, the Football Association is certain he will stay on.
He has spent nearly six decades believing that a childhood friend called Iva Militka betrayed him; he had unwisely contacted her during his clandestine trip.
I made no doubt that I could readily displace the bricks at this point, insert the corpse, and wall the wall up as before, so that no eye could detect anything suspicious.