I felt my face change. The muscles were all stiff, and not from the hit I’d taken. I’m still not great at controlling my expressions, and I had no idea what I looked like.

Each one is built to be extremely rugged, and it will issue its warning upon any outside touch. Causing these units to fail within the space of a microsecond might be possible for the Trisolarans, but it’s not currently possible for humans.” His final sentence put everyone on alert.