Quantum foam - grainy bumps in the fabric of space-time - might explain why light from a distant galaxy arrived four minutes later than expected, offering
Throughout our history, mankind has created tools the same way,
essentially using the top-down approach. Think about it. In the stone
age, a sharp cutting tool was fashioned by using a larger stone to chip
away pieces until the cutting stone was sharp enough. Today, a computer
chip is made by a large laser that etches the circuits into a piece of
silicon.