To my shame, I had not until I checked my blog reader this morning.
Yesterday would have been his 100th birthday, and it was marked on both The Panda's Thumb and Pharyngula.
According to Wikipedia, Bronowski's television series The Ascent of Man was part of the inspiration for Carl Sagan's series Cosmos.
What really got me - made me an instant fan of Bronowski - is this clip from The Ascent of Man that was linked on The Panda's Thumb:
It's moving. It's insightful. It's brilliant. It's heart-wrenchingly human.