What do salad dressings and metal alloys have in common? They need to be mixed well. For dressings, you only need to shake the bottle. But to mix alloys while 3

What do salad dressings and metal alloys have in common? They need to be mixed well. For dressings, you only need to shake the bottle. But to mix alloys while 3D printing, NIST researchers needed to invent a way to stir the molten metal with lasers. 🔗 [↧](https://t.co/…