On the Origin of Species

... is a book by Charles Darwin. But it is also a web page at The Guardian (UK).

150 years ago, Charles Darwin unveiled his theory of natural selection. To mark this anniversary we bring you the definitive guide to the naturalist's great book, with extracts from key chapters and essays from leading scientists and thinkers

Here

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Doctor Charles is waiting.
We declared independence, formed a country, and have been celebrating on the fourth ever since. Here is the second in our series of Fourth of July treats, a glimpse back to the early 20th century, with, yep, you guessed it, pictures by Charles S. Lillybridge:
The Kennedy School of Government had banned all smoking within the building, but had not yet banned smoking just outside the doors facing the Charles River, to the south of the complex.
Births 1840 - Ernst Abbe, German physicist 1857 - Andrija MohoroviÄiÄ, Croatian seismologist