Fifty years later, president-elect Barack Obama opens his victory speech with these words: “If there is anyone out there who still doubts that America is a place where all things are possible; who ...

Top: The ninespine stickleback, Pungitus pungitus, is typical of the saltwater form. Bottom: A freshwater form of stickleback with fewer bony plates and fewer spines. Image based on drawings from the ...

In English grammar, the concept of parallelism demands that there must be a balance in the structures of the words, phrases or clauses we use in a sentence. Such balance ensures clarity, fluidity in ...

Parallel evolution is the independent evolution of similar traits, starting from a similar ancestral condition. Frequently this is the situation in more closely related lineages, where several species ...