It's easier to devein shrimp before they are cooked. 1  Use a sharp paring knife to cut a slit along the outer curve of the shrimp's body. 2  The cut will reveal a dark brown or black vein, the shrimp's digestive tract. 3  Use your fingers, a fork or the paring knife to lift it out of the shrimp and discard it.
Last year marked the bicentenary of the birth of Charles Darwin. But this essay is not about Charles Darwin. It is about a contemporary of his, Herbert Spencer, who was developing a theory of evolution before Darwin and is credited with coining the phrase the survival of the fittest.. His books sold in huge numbers during his lifetime and he was almost certainly the most famous philosopher of the Victorian age.
But Darwin wasn't the first or only scientist to develop a theory of evolution. The French biologist Jean-Baptiste Lamarck came up with the idea that an organism could pass on traits to its offspring, though he was wrong about some of the details. And around the same time as Darwin, British biologist Alfred Russel Wallace independently came up with the theory of evolution by natural selection.