Por que a água é uma das coisas mais estranhas do Universo
The Strange Nature of Water
The Journey of Water
- Water is one of the most peculiar substances in the universe, with each molecule having existed for billions of years.
- Every drop of water has traveled through various forms of life and environments, including dinosaurs and oceans, making all water on Earth essentially "alien."
- The origin of Earth's water comes from asteroids and comets that brought it to our planet long after its formation.
Unique Properties of Water
- Despite being composed of light atoms (hydrogen and oxygen), water exists as a liquid on Earth due to unusual chemical properties; it should be a gas under normal conditions.
- Unlike other liquids, water expands when frozen, allowing ice to float. This property has been crucial for the survival and evolution of complex life during ice ages.
Fascinating Behaviors
- Hot water can freeze faster than cold water—a phenomenon not yet fully understood by scientists.
- Water molecules exhibit cohesion, enabling them to move against gravity through tiny channels in plants and human bodies, facilitating nutrient transport.
Abundance in the Solar System
- Water is not unique to Earth; it's the second most common molecule in the universe, found on celestial bodies like the Moon, Mars, and Pluto.