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  • Take a deep breath.

  • We take 23,000 breaths a day; trying to get oxygen to our brain and cells.

  • Oxygen is essential to our survival.

  • But it's a only small percentage of what's in the air we breathe.

  • So what if there was more of it?

  • These are just a few of the things we'd be dealing with if the Earth's

  • atmosphere had double the amount of oxygen it has today.

  • What else would happen?

  • Our atmosphere contains about 20% oxygen and roughly 78% nitrogen.

  • Even though it's not the most significant part of our atmosphere, it is the most important.

  • 90% of our energy comes from oxygen, with the rest being from food and water.

  • You wouldn't be able to watch this video without oxygen, you wouldn't be able to do anything.

  • That's because you wouldn't be alive.

  • And, not only is oxygen essential for humans, it's vital to all life on Earth.

  • Now, what would happen if the Earth had double the amount of this crucial element?

  • The first thing you'd notice would probably be those giant bugs.

  • Insects breathe through tiny tubes called trachea.

  • Scientists have theorized that if more oxygen were to enter these tubes,

  • insects like spiders and cockroaches would grow much larger.

  • About 300 million years ago, during prehistoric times,

  • Earth's atmosphere was 30% oxygen. During that time,

  • insects were much, much larger.

  • Dragonflies were the size of hawks, while some spiders were the size of small birds.

  • Doubling the Earth's oxygen levels would mean having

  • even more oxygen in our atmosphere than back then.

  • Our insects would be even more enormous.

  • Although these giant insects might scare the pants off of you,

  • you can feel better knowing that you'd have much more energy to outrun them.

  • With a higher oxygen level, you'd notice you that have much more energy.

  • The human endurance records of today would quickly

  • be shattered after everyone gets more oxygen in them.

  • You'd also be more alert.

  • More oxygen in your body, improves your circulation and increases your energy.

  • Humanity would see much less disease, and you'd call in sick a lot less.

  • Or, would you?

  • A type of infection-fighting immune cells known as neutrophils would occur more often,

  • keeping you healthier. You'd get a lot fewer colds!

  • You'd be like Superman!

  • Well, not quite.

  • The increased amount of oxygen your body is getting could also

  • lead to some serious long-term health problems.

  • With the increased levels of oxygen, humans would have an increased chance of oxygen toxicity.

  • This happens when humans are exposed to higher

  • oxygen levels than their bodies are normally used to.

  • Over time, this could lead to lung damage, poor eyesight and cells not being able to reproduce.

  • Having too much oxygen in your body creates free radicals.

  • These atoms look for other electrons to pair up with.

  • When this happens it can cause damage to your body and your DNA.

  • Oh yeah, and what about those crazy fires we mentioned?

  • Well, with more oxygen in the atmosphere

  • things would catch on fire more easily.

  • Generally speaking, when you can't start a fire it's due to the lack of oxygen.

  • With there being even more O2 the atmosphere think of how easy everything would catch fire.

  • Think California forest fires are bad?

  • Expect those to happen all around the world.

  • Even wet vegetation would have a chance at burning.

  • And as for the planet as a whole? Well for one, we'd have a lot more mass.

  • Oxygen isn't just in our atmosphere. It also plays a large part in the Earth's crust.

  • And with more oxygen the crust would be heavier,

  • making the lithosphere heavier than our atmosphere.

  • This would cause things to oxidize, including large bodies of water,

  • turning into hydrogen peroxide.

  • So, some good and some bad comes with this,

  • but luckily you can take a sigh of relief knowing that our atmosphere only has 20% oxygen.

  • And so far it's worked out pretty well for us.

  • But imagine if we had no oxygen?

  • That sounds like a story for another, WHAT IF.

Take a deep breath.

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地球の大気中の酸素が2倍になったら? (What If Oxygen Doubled in Earth’s Atmosphere?)

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    林宜悉 に公開 2021 年 01 月 14 日
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