"From so simple a beginning endless forms most beautiful & most wonderful have been, and are being, evolved" #Darwin twitter.com/lauraleebiolog…

— Laura Hubbard (@lauraleebiology) February 12, 2013

Why are there no dragons? Didn't fire-breathing evolve? #darwin #evolution #dragons ow.ly/hF28n

— Plasma Engineer (@plasma_engineer) February 12, 2013

"A man who dares to waste one hour of time has not discovered the value of life." Happy Birthday Charles Darwin #darwin #entrepreneur

— Dana (@zigzagger105) February 12, 2013

Happy 204th birthday, Charles Darwin! Thanks for observing and following the evidence wherever it lead #science #darwin #evolution

— Skeptical (@RC_Skeptic) February 12, 2013

Happy #Darwin Day!!! Or, as I like to call it, Evolution Awareness Day. Brush up on your knowledge today! twitter.com/CaraColeen/sta…

— Cara Coleen  (@CaraColeen) February 12, 2013

"I am not apt to follow blindly the lead of other men." ~ Charles Darwin ow.ly/hF5G7 #Darwin

— an cailín cainteach (@Trillian_01) February 12, 2013