Synthetic Life and Evolution of Earth’s Second Atmosphere

I have the pleasure of teaching the science of weather and climate to non-scientists again this Fall/Winter session at Toronto’s York University. In the Fall 2011 Term, time was spent discussing the origin and evolution of Earth’s atmosphere. What follows is a post I just shared with the class via Moodle (our LMS):
Photosynthesizing anaerobic lifeforms in Earth’s oceans were likely responsible for systematically enriching Earth’s atmosphere with respect to O2. Through chemical reactions in Earth’s atmosphere, O3 and the O3 layer were systematically derived from this same source of O2. The O3 layer’s ability to minimize the impact of harmful UV radiation, in tandem with the ascent of [O2] to current values of about 21% by volume, were and remain crucial to life as we experience it today.

In tracing the evolution of Earth’s second atmosphere from a composition based on volcanic outgassing to its present state, the role of life was absolutely critical.

On my drive home tonight after today’s lecture, I happened upon a broadcast regarding synthetic life on CBC Radio‘s Ideas. Based upon annotated excerpts from a Craig Venter lecture, this broadcast is well worth the listen in and of itself. And although I’m no life scientist, I can’t help but predict that Venter’s work will ultimately lead to refinements, if not a complete rewrite, of life’s role in the evolution of Earth’s second atmosphere.
If you have any thoughts on this prediction, please feel free to share them here via a comment.

Remembering Steve Jobs

I was doing some errands earlier this evening (Toronto time) … While I was in the car, the all-news station (680news) I had on played some of Steve Jobs’ 2005 commencement address to Stanford grads. As I listened, and later re-read my own blog post on discovering the same address, I’m struck on the event of his passing by the importance of valuing every experience in life. In Jobs’ case, he eventually leveraged his experience with calligraphy to design the typography for the Apple Mac – after a ten-year incubation period!

I think it’s time to read that Stanford commencement address again …

RIP Steve – and thanks much.

Launch: Silicon Valley – Still Time for Submissions

If you plan on being in The Bay Area early this Summer, you may want to take in Launch: Silicon Valley (L:SV). From the event’s Web site comes the following overview:

In its 3rd year, Launch: Silicon Valley is now firmly established as the premier product launch platform for cash strapped startups. The event, co-presented by SVASE, Garage Technology Ventures and Microsoft, provides the next generation of emerging technology companies with the opportunity to pitch their products to, and network with, an audience of Silicon Valley’s top VCs, Angels, corporate business development executives, prospective customers and partners, bloggers and media.

Launch: Silicon Valley 2008 is designed to uncover and showcase products and services from the most exciting of the newest startups in information technology, mobility, security, digital media, next generation internet, life sciences and clean energy.

If you are a startup, you have until May 9, 2008, to submit an executive summary relating to your product offering.
Having never attended L:SV, I can only state that this looks like an excellent opportunity for all stakeholders.
(Thanks to the organizers for making me aware of their event.)