Gateway Arch tram cars tilt curved tracks

The Gateway Arch's tram cars tilt to stay level inside its curved legs

Visitors traveling to the top of St. Louis's Gateway Arch ride in small enclosed tram compartments. Because the track curves as it climbs, the cars use a leveling mechanism to keep passengers upright. The unusual system combines features of an elevator and a Ferris wheel to follow a structure that is neither straight nor vertical.

More than half the world faced COVID-19 lockdowns

3.9 billion people

The number of people under some form of lockdown rose from 1.7 billion on March 26, 2020, to 3.9 billion by the first week of April.

Financial stress can temporarily reduce mental performance

In one set of experiments, lower-income participants performed worse on cognitive tasks after being asked to think about a large unexpected expense. Another study found that Indian sugarcane farmers performed better after harvest, when they had more money, than before it. The results suggest that financial pressure can consume attention needed for other tasks.

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Gateway Arch tram cars tilt curved tracks

The Gateway Arch's tram cars tilt to stay level inside its curved legs

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