Which Gupta period invention made modern technology, such as computers, possible? movement of planets and stars

concept of zero

symbols for the numbers 1 to 9

metalworking

Describe at least three effects of the drug war in mexico.

Drugs have a high potential for abuse. there is no routine therapeutic use for these drugs and they are not available for regular use. they may be obtained for “investigational use only” by applying to the u.s. drug enforcement agency. examples include heroin and lsd. which scheduled drug is this?

What caused the american indians to relocate in the late 1600’s,