现在，阿波罗 - 时代科学家设想的未来已经到来。Their successors, many of whom weren’t even born when the last astronauts scooped up the Moon samples they’ll now be probing in their labs, are ready to take a giant leap towards answering long-standing questions about the evolution of our solar system.
位于马里兰州格林贝尔特的NASA戈达德太空飞行中心(Goddard Space Flight Center)的两支团队被选为研究封存了半个世纪的月球样本的9个科学小组之一。使用尖端的机器可以检测化学成分在土壤颗粒小的尘埃,两戈达德实验室研究生命的基石在太阳系演化以及如何在漫长的月球表面化学的来自太阳的辐射空间。yabovip2021
Amino acids are a set of organic compounds used to build proteins. There are about 500 naturally occurring known amino acids, though only 20 appear in the genetic code. Proteins consist of one or more chains of amino acids called polypeptides. The sequence of the amino acid chain causes the polypeptide to fold into a shape that is biologically active. The amino acid sequences of proteins are encoded in the genes. Nine proteinogenic amino acids are called "essential" for humans because they cannot be produced from other compounds by the human body and so must be taken in as food.