Saturday, May 28, 2011
Wednesday, May 25, 2011
Rob Phillips - A gentle scientific giant
Over the last few months I have had the pleasure of getting to know Rob Phillips. He is a professor at Caltech and a great man. His book - The physical biology of the cell - is a fantastic text and introduction to a new way of doing biology (one that I subscribe to). He is also a great friend.
Sitting in the company of people like Rob Phillips, Boris Shraiman, Mahadevan and Michael Brenner is an experience I am not worthy of.
Sitting in the company of people like Rob Phillips, Boris Shraiman, Mahadevan and Michael Brenner is an experience I am not worthy of.
The National Academy of Science - Boris Shraiman
Working with Boris has been the single most rewarding experience I have yet had. He was recently elected to the National Academy of Sciences. Perhaps the students of every academy member would be equally positive in their comments, however, I believe that Boris represents what is best in science. Regardless, he is a good man and a great friend.
Cambrian explosion
In the Canadian rockies a fossil field called the Burgess Shale was happened upon. Within it, and in other fossil fields (another one found, I believe, in Australia) was found evidence for an evolutionary explosion. The Cambrian explosion is believed, to not just be an artifact of it being a uniquely well preserved period in the Earth's natural history, indeed, paleontologists and the like, believe that around 500 million years ago there really was an "explosion" in the number and type of organisms inhabiting the planet.
It isn't clear, from my superficial knowledge, what aspect of this ought to be surprising. There certainly was a massive change in the Earth's climate at the time as well (a super ice-age had come to an end not so long ago). So is it just an example of where the selective pressures were "evolving" rapidly, or is there something about the organisms and their genomes at that time that suddenly allowed the exploration of a vast range of phenotypes?
Such questions of course get to the hearts of one of the deepest questions in Biology, as I see them. What are the range of phenotypes within the reach of a given genome. Can we begin to understand the tree of life in a statistical manner?
It isn't clear, from my superficial knowledge, what aspect of this ought to be surprising. There certainly was a massive change in the Earth's climate at the time as well (a super ice-age had come to an end not so long ago). So is it just an example of where the selective pressures were "evolving" rapidly, or is there something about the organisms and their genomes at that time that suddenly allowed the exploration of a vast range of phenotypes?
Such questions of course get to the hearts of one of the deepest questions in Biology, as I see them. What are the range of phenotypes within the reach of a given genome. Can we begin to understand the tree of life in a statistical manner?
A bridge of sorts
My ignorance has yet again been revealed. I thought the Aleutian Islands formed an ice-bridge during an ice-age, allowing the movement of animals. Indeed, during an ice-age, vast amounts of water are stored as ice, leading to a drop in sea-levels. This actually created a land-bridge between the North American continent and Asia.
Tuesday, May 24, 2011
Return
I was thoroughly enjoying maintaing this blog and then stopped for a period of 4 months. I am now making an attempt to re-engage with it. I have read, seen and done all manner of things during this hiatus. Instead of even attempting to recount this, I will simply try and fill my future with all manner of new things.
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