When Is Now?

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En bref

Ajouté le

17 mars 2026

Matière et domaine

earth-environment · matter-physical-properties

Niveaux scolaires

9e année (3e)–12e année (Terminale)

Type de page

Video

Mots-clés

science joe hanson it's okay to be smart when is now general relativity special relativity flash lag effect illusion now presentism eternalism albert einstein neuroscience time relativity speed of light time dilation light cone pbs its okay to be smart its ok to be smart pbs digital studios it's ok to be smart

Introduction

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY
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When is now? Seems like a pretty simple question… just look at your watch. But do you and I share the same “now”? Let’s journey from Einstein’s thought experiments about relativity to cutting edge neuroscience research to try and answer that question.

References: https://sites.google.com/view/when-is-now-references/home


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