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The strangest rivers in the world... a very dark river
Do plants warn each other when they are in danger?
What if oxygen disappeared from Earth for five seconds?
Why is the sky blue?
Is there a separation between the Atlantic and Pacific oceans?
Switching from animal protein to plant protein is good for the environment and climate
25 cities around the world are characterized by the best climate throughout the year, including 6 Arab cities
What would happen if oceans disappeared?
5 ways to store rainwater
Smoke from Amazon forest fires chokes the city of Manaus in Brazil
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