Quantum physicist David Deutsch is at TEDGlobal talking about how the stars shine, reality as conjecture and parallel universes. It’s fascinating, but some of us are a little mentally intimidated and Twitter reflected that.

Day 2 @ TED. Settling in for a talk by quantum theorist David Deutsch. Is my mind ready fir this one? — afar_diaz

will virtually hug the first tweeter to tweet the ‘what makes stars shine’ formula ;-) in David Deutsch’s talk — iamhelenharrop

David Deutsch “The Nature of Scientific Explanation” is beyond my twit-ability, sorry. Must. Focus. Brain. Hurts. — ruthannharnisch

Chris Anderson asks physicist David Deutsch how the whole parallel universe thing is going. — shanehegarty

David Deutsch talking about how we should look for the explanation that is the hardest to vary in order to progress in knowledge. — tweodor

Well then, there’s a reason for all the headache.