Compare your arm to the arm of a monkey or the foreleg of a cat and you’ll probably find it as no surprise that they’re made up of similar bones arranged in similar ways. A commonplace observation for us, but for Darwin and other early naturalists, these similarities offered proof for the theory of evolution. The bones in our arms and the bones in the forelimbs of other vertebrates are organized in similar ways because they evol...

Just to clarify, I must be honest and say that this article is not intended to tell you about the genes that control your sex life. If you’re having intimacy problems, you probably won’t find a gene therapist to fix it. Instead, I am going to tell you about fruit flies called Drosophila. They have a sex life too, you know. But before I delve into the details of fruit flies, their genes, and their issues with intimacy, let’s back...

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