Anil mahla

wishing a very prospers krishna janmastmi to all facebook users

ScienceAlert
What exactly is a black hole? Technically they're regions so dense not even light can escape - but how do we know they exist and why are they so important?

An expert explains everything you've ever wanted to know about black holes: http://bit.ly/L7l7YD

This simulated image shows a large black hole with the beautiful Milky Way in the backgroun

Explainer: black holes (Science Alert) What exactly is a black hole? How do we know they exist and why are they so important? Robert Braun explains everything you need to know.

'happy world harritage day'
let determine to save and value our harritage....!