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Why The Food Pyramid Is Now Considered Super Outdated
If you grew up in the '90s, you remember the Food Pyramid. It's now outdated, but why hasn't the USDA provided better health ...
Most rainforests too degraded to provide good habitats 多数雨林退化严重而无法为 ...
Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient world slept only 6.5 hours a night.