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50 of the greatest archaeological discoveries of all time

Health

10 melatonin alternatives for sleep

Spoonfuls of supplements such as chamomile, magnesium pills, vitamin B complex pills and lemon balm.

Health

These 5 foods may be secretly causing your inflammation

Trays of fast food such as donuts, burgers, chicken nuggets, fries and pizza.

Health

Tick bites are on the rise. Here's how to protect yourself.

A tick on a leaf.

Health

Are you mentally healthy? 15 signs to look for

Young woman happily relaxing during a break at work showing a positive work-life balance.

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How much water it takes to create 30 common items

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50 famous firsts from science history

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Dramatic satellite observations that show the true scale of Arctic change

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States ranked from most to least woodsy

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15 ways climate change has impacted winter sports

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Can you solve these real 'Jeopardy!' clues about the Earth?

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Can you solve these real 'Jeopardy!' clues about the oceans?

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25 of the most expensive science experiments in human history

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50 notable medical advancements of the decade

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54 American cities with dangerous ozone conditions

View of the Los Angeles skyline surrounded by smog