Tact,’ Lymond said, ‘is the name you should have upon your tombstone.

People come and people go, but nobody stays forever

I&#39;m not scared of snakes, spiders or heights. I have three children; as a mum, you can&#39;t be afraid of things like that.

The greatest grand challenge for any scientist is discovering how to prevent the spread of HIV and finding the cure or an effective vaccine for AIDS.

Eighty percent of Americans with HIV do not know they are infected.

I wanted to become a mathematician, physicist or astronomer.

Because I believe that humans are computers, I conjectured that computers, like people, can have left- and right-handed versions.

Written By Philip Emeagwali