The city-state's condensed landscape -- the entire country is squeezed into a land area smaller than most big cities -- means visitors can quickly tour some of Singapore's most famous attractions and be back at the airport in a matter of hours.

CNN: Singapore stopover: Make the most of your travel time

Within the chip, the electrons were condensed into a quantum fluid, which were then excited to mix with photons in a state called a polariton.

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