Charles Darwin's groundbreaking work, The Origin of Species, was published 24 November, 1859, 150 years ago today. This makes a rather neat bookend to the Darwin Bicentenary, the year of events commemorating the 200th anniversary of Darwin's birth on 12 February, 1809. I'm going to be lazy and simply link to everything I wrote back concerning that earlier anniversary.
Oh, and serendipitously, today is also the anniversary of the discovery of Lucy in 1974. I saw her in person (behind glass) on a trip to Seattle during last year's fall break, which was pretty cool.