What’s it like, for you to sense me?” she asked. Her eyes were wide now, emerald green in the lamplight and peering into Héyowan.He blushed, taken off guard. ‘Like I’m not alone,’ he almost said.

But in those first hours after you take it, your brain is tuned in like nothing you can imagine. Eyes like the Hubble telescope, sensing light that’s not even on the spectrum. You might be...