Add Yahoo as a preferred source to see more of our stories on Google. Controlled outdoor experiments could also include injecting aerosols into the atmosphere - Vlad Georgescu/Moment RF Experiments to ...
Live Science on MSN
'Negative time' confirmed: Mind-bending experiment shows light can exit a cloud of atoms before it enters, thanks to quantum physics quirk
A new experiment confirms that photons passing through a cloud of atoms can spend a negative amount of time there, and the ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results