How long do new species take to evolve?

Charles Darwin was famous for being amazed at the “infinitely beautiful and most wonderful forms” that evolution had produced, and indeed, a land The day is teeming with An estimated 1 trillion species. But how long did it take for these species to evolve?

The answer varies widely with different life forms, “according to Categories [type of creature] and environmental conditions,” Thomas Smith, Professor of Ecology and Evolution biology at the University of California, Los Angeles, for Live Science. They range from human-observable time scales to tens of millions of years.