An Open Letter to NASA
I am writing you with much concern after having read news about your explorers, which named Phoenix that will be launched by NASA in August 2007 to land and scout the high northern latitudes of Mars to seek life in May 2008  and named LRO that will impact again to the Moon to seek water ice there in 2008 .
I query the actual effects of your programs and advance some suggests for you as follows, according to one of the viewpoints of RIFT EVOLUTIONISM [3-6] (there is rift valley in one star(i.e., heavenly body---edited by sun45114 on July 9, 2006), there could be water body and the life there, such as Mars):
1. Now that the main goal of Phoenix is to seek Mars life, it should land onto Mars’ rift valley directly. If there is some kind of lives on Mars, the Martian living beings should be first appeared in the area of the rift valley, such as Valles Marineris. So, I suggest that the landing site of Phoenix should be onto Mars' rift valley (for example, Valles Marineris).
2. There is no rift valley on our Moon. Therefore, there couldn’t exist any water ice there. The impacting to the southern pole of the Moon in 1999 has testified it. The future impacting of LRO will testify it again! I suggest that NASA should declare with clear and open what’s lurking within permanently darkened craters after the impacting in 2008.
Looking forward to hearing from you!
Tianxi Sun (孙天锡)
Professorial Senior Engineer
P. R. of China
Thu, 13 Apr 2006
 Sun Tianxi, 1987.On biologic evolution with plate breakup. In: International Symposium on Tectonic Evolution and Dynamics of Continental Lithosphere (Abstracts). Beijing, China, 2-143 (in English).
 Sun Tianxi, 1988. Living things and rift valleys. Nature journal, Shanghai, China, 6:430-434 (in Chinese).
 Sun Tianxi, 2001. Rift Evolutionism (Chinese traditional version). Hong Kong Tranfor Publishing Co. Limited, Hong Kong. ISBN: 962-85541-5-8 (in Chinese)
. Sun Tianxi, 2004. Rift Evolutionism (Chinese simplified version). Sichuan Science and Technology Publishing House, Chengdu, China. ISBN: 7-5364-5411-2 (in Chinese).