We are in the universe and the universe is in us. - Neil DeGrasse Tyson Sometimes you just need to talk science, and what better way to say, hey, to a fellow nerd than with these perfect Periodic Thoughts postcards. Embued with scientific quotes and laws, each card is designed using different letters from the Perdiodic Table of Elements. A perfect gift for geeks, nerds, and science lovers, these smart 30 pull-out postcards are held together in perfect binding, so the cards are easy to tear out with no rough edges. Printed on sturdy, heavyweight paper, each card will stand up to the atomic weight of whatever you have to say.