मुनेन्द्र सिँह

मुनेन्द्र सिँह wrote a new post, Why does our finger glow red when a flashlight pointed on it 5 years, 5 months ago

I don’t get a proper answer till now .. I am searched it many times …
Big Bang Boffin and मुनेन्द्र सिँह are now friends 5 years, 5 months ago