Asteroid strikes get all the coverage, but “Medea Hypothesis” author Peter Ward argues that most of Earth’s mass extinctions were caused by lowly bacteria. The culprit, a poison called hydrogen sulfide, may have an interesting application in medicine. Peter Douglas Ward is a paleontologist and professor of Biology and of Earth and Space Sciences at…
The Truth About Climate Change is a two part documentary presented by Sir David Attenborough who asks the question ‘What is the future for our world?’ Some extraordinary phenomena have taken place in recent times; Hurricane Katrina, the heat wave of 2003, polar bears swimming in search of ice and vast swarms of insects enveloping…
FRONTLINE Episode: HEAT A far-reaching investigation into America’s energy landscape and what can be done to save our planet – and what it will take. Full version http://video.pbs.org/video/994540147/ (Region locked)