science facts

Top 10 best science facts 2021

Welcome to the top 10 best science facts of 2021, These are my all-time favourite facts and they are outright amazing!

I love science and reading facts about different topics within the scientific world is sometimes shocking & frightening and sometimes just absolutely beautiful. I promise you that none of the science facts here will scare you but they might make you feel small. I apologize in advance.

But anyhow I’d say it’s worth it. Personally, thinking about the universe makes me feel small, big, happy, and sad all at the same time. You’re free to feel however you want! You can leave your thought by commenting at the end of this article.

1. When babies are born, they have 100 more bones than an adult.

Not sure how to feel about this one but an interesting fact nonetheless. The reason for this is to make the passage through the birth canal easier and it helps speed up the growth of the baby. Many of the 100 bones fuse with time, eventually making up 206 bones altogether.

2. Phytoplankton produce between 50 to 85 percent of the oxygen on Earth

A satellite image of phytoplankton taken by NASA – Read More

Most of the oxygen we breathe actually comes from ocean plants called phytoplankton. This is proof of how important our oceans are, and why we should take well good care of it.

3. A teaspoonful of neutron star would weigh 6 billion tons

The math is too complicated for my brain but basically because a Neutron Star is so dense, taking a theoretical teaspoon and scooping from the star would weigh the teaspoon in at a massive 6 billion tons! Mind-boggling!

4. In 2.3 billion years the Earth will be too warm for life and water

Oh No!


As the Sun ages, it expands its outer layers and heats up more and more, it does this to the point that the earth will become burnt like popcorn left in the microwave for too long. I’d suspect it would look more like Mars. This process takes over hundreds of millions of years. Let’s hope our technology progresses far enough that our real estate expands beyond our solar system. It is predicted that the sun will engulf the earth completely eventually when it becomes a red giant. Although it is uncertain.

Read more about the life of stars here How do stars form and evolve

5. It takes 8 minutes, 19 seconds for light to travel from the Sun to the Earth

This is probably common knowledge, although I commonly hear “about 10 minutes” from people. The light is flying at the incredible speed of 300 Thousand kilometres per SECOND! Still slower than me running away from responsibilities.

it’s around 150 million kilometres from the sun to us here on earth, which when you do the math, makes up to about 8 minutes and 19 seconds. Compared to Pluto, it takes 5 hours and 30 minutes for the sun to reach its surface. If you think about it’s like time travel, we are seeing the sun how it was 8 minutes ago.

6. The DNA in your body could make a round trip from the Sun to Pluto 17 times

DNA molecules of this size are around 5 cm on average uncoiled. there are a mind-numbing 37 trillion cells in our bodies, When you uncoil all of the DNA in each cell inside our body, it would reach the former planet Pluto and back to earth 17 times in total! Crazy stuff, makes me feel big! Oh Sorry… did I say from Earth to Pluto? I meant from the Sun to Pluto… could barely believe it myself I accidentally wrote earth.

7. It takes a photon 40,000 years to go from the core to the surface of the Sun

The reason for this is because of the apparent random ways in which the photons travel inside the star. it jumps back and forth and swings around as it makes its way to the surface as if it is drunk. A photon gets itself trapped in a way, by an atom and then released again shooting it in a new direction. This process could take millions of years! So the light you see today might be a million years old and not just 8 minutes old.

8. In 80 years, A human walks a distance equivalent to walking five times around the world


The average person up to the age of 80 will have walked around the earth 5 times because we walk on average 7500 steps per day.

In total, you will have walked around 177,027 kilometres in your life. I could only imagine how many steps I’ve taken in video games in total. probably much much more.

9. The observable universe is made up of 50 billion galaxies.

There are between 100 billion and 1 trillion stars in a galaxy. In the Milky Way, which we occupy, there could be 100 billion Earth-like planets. I guarantee you that we are not alone, even if it is just a tiny fish-like animal.

10. The radius of the observable universe is about 46 billion light-years – But that’s not all…


The Observable universe may be HUGE but that’s just light that has had enough time to reach us. The horizon keeps expanding meaning that the Observable universe will only get bigger. But here’s the catch… The whole universe is expanding, faster than the speed of light, and because the light travels with the expansion, some light will never reach earth. This may make you feel small.

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Thanks for reading my top 10 best science facts! What do you think of these facts? Comment below and maybe spark a wonderful conversation about the universe! Remember, this is just my favourites, you may disagree.

You can read my other stuff by going here – Blog

And lastly, if you find these facts interesting, consider sharing this page with your friends!


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