Serendipity ! Is it ?

Since my childhood i have always been fascinated towards science. Sci-Fi is my favourite category of books and i always prefer reading a scientific article over any other piece of news.

My roommates call me a veteran doctor as I love watching animal documanteries.

I have always had few questions in my curious mind that i never got a platform to ask, I agree this is not a appropriate platform , but just in case someone hears my SOS.

Here is what the scientist in me ponders at:

In some sense I feel humans are unlucky -

1. We have only one moon to see ? Well this i know why

For the below questions i'll be grateful if someone provides me answers.

2. Why is there only a single species of homo sapiens left on earth? One of the most strangest thing I find is that only same species can reproduce naturally.

3. What property of oxygen makes it the only element be a life giver?

4. The age of the universe is estimated to be 13.7 billion years. It means that the farthest light we have ever seen has come from objects that far. What if there are still parts of universe from where light still hasn't reached us. In case in future, if light from such areas reaches us, will we have to revise the age of universe?

5. How is the speed of light an exact number? Where as many constants in physics are approximated.

speed of light = sqrt(magnetic constant*electric constant)

The exact values of these constants are known which makes speed of light a exact number.


6. What makes the absolute zero temperature the lowest achievable temperature? What happens to the substance at absolute zero?

7. How is matter just being created from nowhere,universe is ever expanding, is there so much energy still left in universe which is getting converted to matter?

I will leave my list of questions here. Hoping that some one might throw some light on these.

A trivia: A voting was conducted to choose two most important mathematical equations. Top two finalists were:

1. Pythagoras Theoram :



2. Equation of relativity : E = mc²