What was the natural radioactivity in prehistoric time

Subject: What was the natural radioactivity in prehistoric time

Date: Sat Oct 30 11:05:11 2004
Posted by Osmo
Grade level: grad (science) School: No school entered.
City: Mikkeli State/Province: SAVO Country: FINLAND
Area of science: Earth Sciences
ID: 1099152311.Es

Message:


How much has the natural radioactivity or background radiation been in
prehistoric earth? Has this had impact to or during evolution? Can the natural
radiation in those early days be estimated nowadays? How has the relation
between space radiation and "earth based" radiation changed during history?

Re: What was the natural radioactivity in prehistoric time

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