Drinking Ancient History: Discover the Secrets in Your Water
cast light on: to provide new information about something
Most of the water we drink is about 4.5 billion years old. This means it formed even before Earth was born.
Scientists say the Solar System developed in stages, beginning with a molecular cloud from a past supernova. This cloud, rich in hydrogen and oxygen, gradually formed water. Interestingly, Earth’s water has a unique “heavy water” signature, casting light on its ancient cosmic origin.
So, the next time you drink water, remember you’re tasting a bit of history from billions of years ago!
Sample sentences
1. The detective’s discovery shed cast on the mystery of the missing necklace.
2. The teacher used a diagram to cast light on the complicated process.
3. The tour guide’s story cast light on the history of the ancient castle.
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