Why is the Human Genome project called a mega project?

Why is human genome project called a mega project ?

Why 'Human Genome Project’ is called Mega Projects’?

Assertion (A): Human genome project was called a mega project. Reason (R): Human genome has approximately 3 xx 10^9 bp, and if the cost of sequencing required is US $ 3 per bp, the total estimated cost of the project would be approximately 9 bilUon US dollars.

Why is human genome called a mega project?

Define human genome project.

Who initiated Human Genome Project?