[Avodah] Modifying Halachos based on scientific findings?

[Rich, Joel]

	Do we change Halachos based on scientific findings?
	The two I am referring to are Birchat Hachama. 
	On this one we hold by Amora Shemuel Calendar. A year is 365.25
days, although scientifically we know that a year is closer to 365.24
days. We did not change the cycle of blessing the sun, we do it every 28
x 365.25 days.
	 
	 
	Can we do that?
	 
	galsaba
	 
	 
	
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	In a word (a la R'YBS), No.
	You might find this shiur of interest on the topic
	
	http://www.ygwh.org/user/Birkas%20HaChamah.mp3
<blocked::http://www.ygwh.org/user/Birkas HaChamah.mp3> 
	KT
	Joel Rich 
	
	
	
	 

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