Ared shift in light from very distant suggests that the universe is

Expanding continually outwards.

basically, if a light moves to the red end, the light wave's wavelength is bigger. if the wavelength increases, the light source must be going further than us.

therefore the universe is continually expanding outwards

this also means it all started in one tiny point

must have exploded

proves the big bang theory

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.