投稿日：2018/04/24(火) 10:30
投稿者：Kelley　[home]　[mail]

Cool site goodluck :) where to buy metabo379 Since the radioactive half-life of potassium-40 is about 1.3 billion years, much shorter than the lifetime of Titan, the small amount of argon-40 in the atmosphere provides an important indicator of how much outgassing has occurred from the deep interior.