interesting fact for physics

• The speed of light in a vacuum is 299,792,458 meters per second.
• The laws of physics are the same for all observers in uniform motion relative to one another (known as the principle of relativity).
• The universe is made up of atoms, which are composed of protons, neutrons, and electrons.
• Physics is the science of matter and its behavior.
• It aims to understand how the universe works.
• Some particles can communicate faster than light.
• Time freezes inside a black hole.
• Steel is more elastic than rubber.
• A clock on Jupiter runs slower than on Earth.

 You Gain More Mass the More You Run 
Running is typically done to shed extra weight and stay in shape, but physics has an answer that may seem a little paradoxical. The idea of mass variation with speed states that you gain mass as you increase your speed. It is an empirically and mathematically established fact. 
Does that imply, however, that speed racers are getting bigger? They are certainly gaining weight, but not significantly. You have to accelerate almost near the speed of light in order to gain any significant mass. If your mass doubles, your speed needs to be equivalent to around 87% of the speed of light. Forget about it—that would be 260 million meters per second.

Less than 5% of the Universe Is What You See and Feel 
The vastness of the universe is evident when one observes numerous huge cosmic objects. Just take a look at our planet—it is so vast that you could never spend a lifetime fully exploring every inch of it. Now you see how small you are as you look up at the sky and take in that universe. Is that all, though? No, less than 5% of the universe is made up of the stuff you can see and feel. 
This begs the question, what else are we blind to see? Dark energy and dark matter are what they are. Although we have not observed these types of matter and energy, they are necessary for our observations to align.
On the event horizon, inside the black hole, it is possible. It's a little complicated, though, because time within the black hole freezes in the eyes of a distant observer, not the person going into it. Time dilation caused by gravity makes this possible. Time becomes endlessly long for black holes, meaning that there