Planck units.
How old is our body? This might seem very absurd to ask how old we are. We would immediately say the time passed since we took our first breath. However, we are made of trillions of cells which are further made of atoms and molecules. The atoms in our bodies are quite old. We eat food which is broken down in smaller molecules which is absorbed by our body. The atoms transfer energy from food to us. The foods we eat get the energy from the soil where they are grown and so on. The growth of any living thing represents the accumulation of these atoms. So the question is how did the soil get these atoms. The age of the earth- Our earth is approximately 4.54 billion years old. The earth was created from the Sun, which is all sources of energy to any life on earth. So you may think if the earth was created from the sun then both should have the same composition but it is not true. The sun is made of mostly a single proton atom that is hydrogen. Because of the enormous mass of the sun, th