Once we have TDC correctly positioned, the next step is to set up the dial indicator and lifter. The Crower cam in our big-block is a hydraulic roller.

And unlike a dial indicator — at least the analog type — this sensor outputs an easily digitized signal. That comes courtesy of a simple opto-interrupter sensor, which measures the position of ...

Robots have been a thing for a long time, but they've never quite met expectations. While AI has changed the game for chatbots, it's not quite so clear for robots. NPR science desk correspondent ...