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You might have seen super heroes saving the planet from monster attacks and alien invasion. Are all of those super heroes saving the world just stories or there are instances where some hero saved the world from a terrible catastrophes? Let's jump right into the story of  Stanislav Yevgrafovich Petrov who saved the world from a nuclear war. On 26th September 1983,  Petrov was the duty officer at the command center for the Oko  nuclear early-warning system. He  was a lieutenant colonel of the Soviet Air Defense Forces. His job was to monitor signs of incoming missiles and report to the higher officials in case of an attack. On that day, for the first time the nuclear early warning system of the Soviet Union reported the launch of multiple USAF Minuteman intercontinental ballistic missiles from bases in the United States. What Petrov decided to do saved the world from a nuclear war on that day. so, what was the amazing act he did? He didn't report it to anyon...

We all have heard about 'Gut Instinct' or 'Second Brain' in our body. People often tell you to trust you gut instinct. But what exactly is it and how accurate is your gut instinct? Let's find out. Do you ever find yourself in a situation and there is a spontaneous thought, the voice in your head tells you to back off? A sudden anxiety and tension right before you receive some bad news? These feelings are often caused by your gut, not your brain. The 'Enteric Nervous System' is responsible for the control and communication of the entire gastrointestinal system. It is a larger group of neurons and nerves that can actually act as a second brain. A normal Human brain processes about 400 billion bits of information every second. But our conscious mind doesn't really use all these information. But our brain and our enteric nervous system together can make really accurate prediction of the immediate future. If the prediction is going to have a negativ...

We all have seen candles flames and we know the shape of them. Which ever be the shape of the candle wick the flames almost have the same shape. But, what gives them this particular shape..? Let's find out. Something that pulls us all down towards the earth is the one which makes the flames go up. Yes, it's the gravity. In order to better understand it, lets see what makes the fire. We have been using fire for thousands of years. From early campfires of primitive humans to the modern automobiles, we have been learning and improving the combustion techniques. Lets consider a candle flame. Hydrocarbons from the candle combines with oxygen and gives out light, heat, carbon dioxide and water. When the temperature of air around the flame increases, it rises upwards and cold air from surrounding occupies the space. This upward flow continues and the flame takes a tear drop shape. But at zero or micro-gravity conditions, the density difference doesn't come into the picture. ...

Can you actually balance a ball on top of a jet of water..? If the mass of the ball is small enough for the for the upward stream of water, then yes you can. Science behind this is called Hydro Dynamic Levitation. You can not only balance a ball, but also a disc on it's curved side. Amazed..? Let's discuss how it works. When the water jet touches the side of the ball, it gives an upward force on the side of the ball there by initiating the spin. since the water sticks on to the spinning ball it gets thrown over to the other side of the ball. Thus the ball applies a force on to the water in an outward direction. Since the ball is in a constant spin, it maintains the angular momentum. The force opposing of water thrown over to the other side and the stickiness of water on the side of the ball lets the ball to achieve equilibrium and stay spinning. Don't confuse this with Magnus or Conada effects. Because for the Magnus effect to occur, the ball must be spinning befo...

What can extinguish the sun..? We know water can put out fire. So, what if we manage to bring up a considerably huge mass of water to the sun and drop it there successfully? What will happen? Let's see an approximate amount of energy that reaches the earth from the sun. The earth itself gets about one hundred and seventy trillion kilowatts of energy from the sun in a single day. But is this nowhere near the actual amount that the sun gives out. The sun disburses energy which is two billion times of what we receive at our planet.  All these energy is given out to the outer space. So, let's see what will happen if we drop huge mass of water on sun. In order to know about the outcome, we first need to know how water helps put out fire down here at earth. The fire needs a fuel for its existance and when water breaks the supply of combustable fuel, it gets extinguished. But in the case of sun, its not normal fire that we are talking about. The source of energy in the sun is ...