science.
Generally, in a book a hero is a good person who does good things and is the main character. An anti-hero can also be a main character but he will do evil things.
Scientists find things out by doing experiments.
Scientists learn a few different things. Scientists learn new things very day.
Good readers can do anything they want to. Some good readers are professional basketball players. Others are scientists, and some are unemployed.
Depending on the metal, heat and electricity are two main things that metal are good at conducting.
The main source is satelieghts, as they can go further than men/women. Also, scientists on Earth have taken the data, and worked things out from it, example: red shift
To prove they exist
There are lots of questions science can't answer, for example if a new technology will be good or bad, a good example for this is stem cell research.
nope
list three things that the scientists learned about earth in the 1800's?
no, it only helped the scientists now discover how the pharaohs of Egypt did good things for the people.
the main industries in Pakistan is actually not anything because they have allot of good things they do and also they are good as cricket just like India is good at cricket but which one is better ? its up to u