
Sweat is made of water and salt. When we sweat, we feel thirsty. We need to drink more water! This keeps us cool and safe.
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Long ago, sundials were used to tell time. Now we use clocks. Sundials show … read more
This lava is flowing from the Kīlauea Volcano in Hawaii. … read more
A New Year has begun. Let’s look at some New … read more
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