How did hands evolve? Scientists studying baby fish discovered that certain DNA parts act like switches, turning body instructions on and off. Long ago, these switches built the nether region of the body. Over time, evolution reused the same switches at the tips of fins, helping form fingers and toes when some fish moved onto land about 360 million years ago. Hands didn’t need new genes – they grew from old instructions used in a new place, showing how evolution can create amazing changes.
How did hands evolve? Scientists studying baby fish discovered that certain DNA parts act like switches, turning body instructions on and off. Long ago, these switches built the nether region of the body. Over time, evolution reused the same switches at the tips of fins, helping form fingers and toes when some fish moved onto land about 360 million years ago. Hands didn’t need new genes – they grew from old instructions used in a new place, showing how evolution can create amazing changes.