Reading, math scores fell sharply during pandemic, data show

Math and reading scores for America's 9-year-olds fell dramatically during the first two years of the pandemic, according to a new federal study—offering an early glimpse of the sheer magnitude of the learning setbacks ...

Imaging the brain with ultrasound waves

Both ultrasound for medical imaging and seismology for imaging the Earth's interior measure the propagation of waves through matter. For example, when seismic waves encounter material differences in the Earth's interior, ...

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