RE: Re: " we're evolved for radiation " - geophysicist on pole revers als

["Jacobus, John (NIH/OD/ORS)" <jacobusj@ors.od.nih.gov>]

Jim,

The magnetic fields shield the earth for the electron and protrons that are

ejected from the sun.  However, they do not protect us from the high energy

cosmic radiation that penetrates into the atmosphere.  (It is one of those

physics things.)  What plain physics fact were you talking about?



When I get a chance, I will crack open my old file of cosmic radiation

studies that I started to collect 10 years ago.



-- John

John Jacobus, MS

Certified Health Physicist

3050 Traymore Lane

Bowie, MD  20715-2024



-----Original Message-----

From: Muckerheide

Sent: 11/4/2002 8:46:41 PM

To: Jacobus, John (NIH/OD/ORS); Jaroslav Franta; radsafe@list.vanderbilt.edu

Subject: Re: " we're evolved for radiation " - geophysicist on pole revers

als



on 11/4/02 1:56 PM, Jacobus, John (NIH/OD/ORS) at jacobusj@ors.od.nih.gov

wrote:



> Jaro,

> My comments are based on my disbelief that the magnetic field of the earth

> has any influence of the radiation we receive from space,



How do you "disbelieve" a plain physics fact!?  (It's not even biology!)



Regards, Jim



>whether it is

> ionizing or UV.  I was wonder why the comment was made "we're evolved for

> radiation" in the context of the article.

> By the way, I believe that Mars lacks a magnetic field.  Of course, we do

> not know if life exist there, so maybe a magnetic field is necessary.

. . .

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