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HumansEvolving an arch across the foot’s width helped hominids walk upright
The arch across the foot evolved at least 3.4 million years ago, possibly before the lengthwise arch. Both arches help humans to walk and run.
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ClimateOrdering from a local store can curb online shopping’s CO₂ emissions
Online shopping isn’t necessarily better for the environment than going to the store in person, a new study finds.
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Health & MedicineCoronavirus’ spread in the U.S. may be a question of when, not if
The virus that causes COVID-19 is likely to gain a foothold in U.S. communities, says the US Centers for Disease Control and Prevention.