Which prehistoric native american group were the first to have been discovered using fire for cooking and warmth?

What notable inventions came out of china? choose all answers that are correct.1.) silverware2.) gunpowder3.) printing4.) magnetic compass

Simple astronomical telescope the objective lens has a focal length of 75 cm and that of a piece of 5cm of the lenses are 18 cm apart when will be final image of a distant object before

What is the approximate chemical composition of the solar nebula?