science facts in hindi: Interesting Facts: Cockroaches can live without a head for a week, know 7 such secrets of science – interesting facts about science that nobody knows


  • DNA is used to coat cotton fabrics
  • Hawaii is moving closer to Alaska by 7.5 cm every year
  • Know here such interesting facts related to science

Science Facts In Hindi: Science is a subject whose mystery still remains. The more research is done on this topic, the more curiosity increases. People learn and explore this subject, to test their mind and uncover new mysteries. But sometimes we get stuck in different thoughts and thinking and we need to think something different to get our mind out of this confused state.

1. Hawaii is moving closer to Alaska by 7.5 cm every year
This is caused by tectonic plates that are in constant motion, driven by the rising and falling currents beneath them. Hawaii remains at the center of the Pacific Plate and because of this constant movement every year, Hawaii is slowly and steadily moving back across the North American platform toward Alaska.

2. Cockroach can live up to a week without a head
Cockroaches are famous for their hard work. Their circulatory system is open, so they breathe through tiny holes located in each segment of their body, they do not rely on the mouth or head for breathing. Therefore, the cockroach can live for a week or more. Cockroach dies only because without mouth it cannot drink water and dies of thirst.

3. On adding salt to the water, the water level goes down
According to science, when a handful of salt is added to a glass of water, the volume of water in the glass is reduced by 2%. This is because when salt is added to water, the solvent molecules in the water become more organized in the vicinity of the dissociated ion.
Also read: GK Questions: If you are preparing for government job then you should know the answers to these questions

4. Some metals explode when in contact with water
It is a fact that when some metals come in contact with air, they get oxidized immediately because these metals are highly reactive. Sodium, potassium, lithium, rubidium and cesium are prominent among these metals, and when these metals are put in water, they explode. We know that all these are alkali metals and they have only one electron in their outermost shell, due to which they easily give up this electron and form bonds with other metals. Hence these metals do not exist independently in nature.

5. Did you know that DNA is also a fire retardant?
Research has shown that when cotton fabrics are coated with DNA, the genetic material found in the DNA reduces the flammability of the fabric. The reason for this is the phosphate present in DNA which when heated forms phosphoric acid, which acts as a fire retardant substance by replacing water. In fact the nitrogen present in the DNA produces ammonia which inhibits combustion.
Also read: Facts About Thar Desert: Due to heat, the sand of Thar desert starts boiling, villages are miles away here

6. We do not detect smell while sleeping
Researchers from Brown University conducted a trial in 2004 on 3 healthy men and 3 healthy women aged 20 to 25 years. In which it was found that all the people woke up in a jiffy due to the loud noise, but the smell had no effect on them. In which it is proved that we do not detect smell when we are sleeping.

7. That’s why lightning flashes and clouds thunder
During rain, small particles of water present in the cloud get charged due to the rubbing of air. Some clouds have a positive charge and some have a negative charge. When a positively charged cloud approaches a negatively charged cloud, an electric potential difference of millions of volts is created between them. Due to such high potential difference, electric current starts flowing in the air between them. This produces a line of light. We call it flashing of lightning. Electric current produces a lot of heat. Due to which the air expands completely. Due to sudden expansion, innumerable molecules of air collide with each other, only the sound produced by their collision causes thunder.