Heating or cooling systems will have to be developed to allow people and animals to exist in colder or hotter living conditions. 加热或者制冷系统不得不进一步发展从而允许人类和动物在更冷或者更热的环境中生存。
An alternative theory is that the sinking part of the plate, which is denser than the hotter surrounding mantle, pulls the rest of the plate after it. 另外一个理论认为,板块的下沉部分,其密度高于更热的周围地幔,会牵拉板块的其余部分。