The knowledge we pick up there sets the foundations for all the other amazing things we go on to study. But science definitely doesn't end at high school, and it's once you take your learning to the next level that things get really interesting.
1. There is enough DNA in an average person’s body to stretch from the sun to Pluto and back 17 times


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The human genome, the genetic code in each human cell, contains 23 DNA molecules each containing from 500 thousand to 2.5 million nucleus pair. There are about 37 trillion cells in the human body and if you’d uncoil all of the DNA encased in each cell and put them end to end, then these would sum to a total length of 2×1014 meters or enough for 17 Pluto round trips.
2.The average human body carries ten times more bacterial cells than human cells
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It’s funny how we compulsively wash our hands, grimace when someone sneezes near us—in fact, we do everything we can to avoid unnecessary encounters with the germ world. The truth of the matter is that each and every one of us is a walking dish! All the bacteria living inside you would fill a half-gallon jug.
3.It can take a photon 40,000 years to travel from the core of the sun to its surface, but only 8 minutes to travel the rest of the way to Earth


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From the core to the sun’s surface (696,000 kilometer) where it can escape into space, a photon needs to make a huge number of drunken jumps. The calculation is a little tricky, but the conclusion is that a photon takes between many thousands and many millions of years to drunkenly wander to the surface of the Sun. In a way, the light that reaches us today is energy produced maybe millions of years ago.
4.The average person walks the equivalent of five times around the world in a lifetime


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The average moderately active person take around 7,500 step/day. If you maintain that daily average and live until 80 years of age, you’ll have walked about 216,262,500 steps in your lifetime. Doing the math; the average person with the average stride living until 80 will walk a distance of around 110,000 miles. Which is the equivalent of walking about 5 times around the Earth, right on the equator.
5.When Helium is cooled to almost absolute zero (-460°F or -273°C), the lowest temperature possible, it becomes a liquid with surprising properties:it flows against gravity and will start running up and over the lip of a glass container!
We all know helium as a gas for blowing up balloons and making people talk like chipmunk, but what most people don’t know is that it comes in two distinct liquid states, one of which is borderline creepy. When helium is just a few degrees below its boiling point of 452 degrees Fahrenheit (–269 degrees Celsius) it will suddenly be able to do things that other fluids can’t, like dribble through molecule-thin cracks, climb up and over the sides of a dish, and remain motionless when its container is spun. No longer a mere liquid, the helium has become a super fluid, a liquid that flows without friction.
6. An individual blood cell takes about 60 seconds to make a complete circuit of the body


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You have about 5 liter of blood in your body (at least most people do) and the average heart pumps about 70 ml of blood out with each beat. Also, a healthy heart beats around 70 times a minute. So, if you multiply the amount of blood that the heart can pump by the number of beats in a minute, you actually get about 4.9 liter of blood, which is almost your whole body’s worth of blood. In just a minute, the hearts pumps the entire blood volume around your body