The term "radiation" has held negative connotations for me but our class discussion informed me that there are some natural and good ways to view radiation. The sun exposes us to a bit of radiation and we could not thrive without that source. Medical imaging has come a long way in being able to see pathologies through the use of radiology and have greatly reduced exposure levels. Nuclear power as a source of energy belongs is not a positive or good use as far as I am concerned. The dangers of an accident far out weigh its use for energy when there are other, safer sources of energy all around us.
The links on cell biology offered insight on another aspect of the microscopic world - the extraordinary variety and function of cells. Movement of these tiny cells is incredible to see and there is still so much we don't know. Scientists have proposed three accepted theories, so far, as to how tiny cells found a suitable environment to thrive and evolve: the primordial soup; deep in the water near hydrovents; and raining down from space. Fascinating!
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