Vignettes: Paul Horowitz

Paul Horowitz

Lets’s compress the time between the sun forming and today into one “day.” Life formed around 05:20. The last hour, dinosaurs became exect at 11:39. In the last minute, neaderthals didn’t come until 11:59:58.1. Here’s the picture of the graph.

Time Compression

Paul said that when he tells people that there are more stars than grains of sand in all the beaches on earth, they go “yeah right” so he did some back of the envelope calculations:

Grains of Sand


  1. Ali Dehghanpour
    Posted August 30, 2008 at 10:57 pm | Permalink

    Is there a way which we could download these presentation? Like we used to do in TED???

    • Posted December 11, 2008 at 5:42 pm | Permalink

      Yes I believe they’re on the TED site.

Post a Comment

Required fields are marked *


%d bloggers like this: