Newton's first law. newton's first law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. it may be seen as a statement about inertia, that objects will remain in their state of motion unless a force acts to change the motion.

Humans have survived and thrived in mexico city by using technology to create greater access to land. when the spanish conquered the aztec capital, tenochtitlan, in the 16th century, they built mexico city by draining the lakes and filling in the lake water to create more arable land for agriculture. this technique of land reclamation has continued to be fundamental to human civilization in mexico city.