Jonathan Challis

Jonathan Challis >

2
Videos
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Steve Jobs - One Last Thing - The Life of the Visionary Tech Icon
PBS
Few men have changed our everyday world of work, leisure and human communication in the way that Steve Jobs, Apple's former CEO, has done. The scope of his impact was evident in the outpouring of tributes from around the world…
Asteroid: Doomsday or Payday?
Part of the Series: NOVA
PBS
The asteroid that exploded over Siberia--injuring more than 1,000 and damaging buildings in six cities--was a shocking reminder that Earth is a target in a cosmic shooting range. From the width of a football field to the size of a…