What is Oxygen?

Discovered in the 18th century by Carl Wilhelm Scheele and Joseph Priestly, this life-sustaining element is crucial for respiration and Earth's ecosystem.

This colorless, odorless, tasteless gas comprises 46% of Earth's crust by mass, 21% of the atmosphere by volume, and a whopping 89% of seawater by weight. Have you ever thought of oxygen as an evolutionary constraint? Research has indicated the vital role played by oxygen in the evolution of complex life forms.

Is there anything as important, yet often overlooked, as the air we breathe? You can survive 3 weeks without food, 3 days without water, but just 3 minutes without the air. Have you ever given a thought as to how much oxygen you consume on a daily basis? You inhale around 2200 liters of oxygen every day and exhale around 1650. So you need around 550 liters of oxygen every single day for your survival.