Math & Technology

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fizzy chemical

BUBBLE POWER  A fizzing chemical leaves a jet of bubbles in its wake as it races through a liquid. Such bubbles could propel drugs into wounds to stop blood loss. 

Early Bird satellite

EARLY BIRD  Engineers work on Intelsat I, also known as Early Bird, one of the first international communication satellites. It launched in 1965 to relay and broadcast TV signals between Europe and the United States.

puppies and kittens chart

FURRY MATH  The Erdős discrepancy problem examines sequences of 1s and –1s or, in this case, puppies and kittens. The goal is to see how effectively one can minimize the difference between the number of cats and dogs in various subsequences. Here, the difference in each row doesn’t exceed one.

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