In fairness, they cannibalize their visual cortex to do that:)

There's the cue for my biennial reread of Peter Watts' Blindsight.

	▲	Bluestein 8 days ago \| parent \| next [-]
		Went into my list. Appreciated :)
	▲	kamarg 8 days ago \| parent \| prev [-]
		Did you read his followup Echopraxia? How would you say it compared to Blindsight?

I'm pretty sure you can train yourself to do the same, but the effort probably doesn't seem worth it for most people.