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Want more good bugs in your gut? Try yogurt. And coffee
Some fertility treatments produce more boy babies. Here’s why
Americans’ opposition to animal testing at record high, survey finds
Children exposed to marijuana smoke may absorb traces of the drug
Injecting stem cells into the brain reverses Parkinson’s symptoms in monkeys
How red meat spurs changes in the gut that can raise heart attack risk
Rich countries are more anxious than poorer countries
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