An archaean converts dna into proteins very differently from , say , streptococcus-in fact , protein synthesis in archaea is more similar to the human process than to bacteria .
He says by examining oxidation rates they have shown the mantle has cooled several hundred degrees since the archaean .
丹尤柴夫斯基说，通过检测氧化的速度，他们证明了自从太古代以来，地幔冷却了好几百度。
A study published this month in environmental microbiology describes a " giant " archaean that grows to 3 centimeters long and is nearly visible without magnification ( it 's just 0.1 mm thick ) .
