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Did you know the vast majority of every water molecule on planet Earth is 4.5 billion years old? Only a tiny percent of the 3,000,000,000,000,000,000,000* pounds of water on Earth is drinkable however, because most of it is salty, locked up in ice, or underground. (*For you math types, that’s three sextillion pounds of water.)  
See related CuriOdyssey video on water here.

Where has your water been?

Before water ends up in your glass, it has been recycled through the water cycle and has also passed through living creatures. Can you believe that all of your drinking water has passed through a dinosaur? It’s true! Watch this video about dinosaur pee!

In the Bay Area, our tap water comes from snow melt that is collected in the Hetch Hetchy Reservoir in the Sierra Nevada Mountain range.

Hetch Hetchy Reservoir

John Muir described the Hetch Hetchy valley as, “one of Nature’s rarest and most precious mountain temples,” and compared its beauty to Yosemite. John Muir actually argued against building the dam. Click to learn more about how to restore Hetch Hetchy Valley.

Transpiration Activity

Download this activity about transpiration (the process by which water is released from a plant through microscopic holes called stomata) and learn more about what’s happening!

Find science activities, science and animal videos and more at CuriOdyssey’s Online At-Home Science Center. Join us online #CuriOdyssey

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