Yes, if it is 'up'. It looks like a red-orange star.
Yes, Mars can be seen at night without a telescope. It's a "naked eye object".
Yes.
Often. In fact, it can often be seen at night without a telescope; it's fairly bright.
You can see Mars without a telescope when it is visible in the night sky and relatively close to Earth during its opposition, which occurs approximately every two years. Mars is typically visible to the naked eye as a bright reddish-orange object in the sky during these times.
Yes, the planet Mars is visible to the naked eye.
Yes, but ONLY in ideal conditions, so realistically, no.
A loooooong time ago; it is visible in the night sky without telescope, so it was discovered by the mestopatanians.
Yes. Mars has been known since ancient times, long before the telescope was invented.
Certainly. Mars is often highly visible with the naked eye.
Yes, some planets such as Venus, Mars, Jupiter, and Saturn are bright enough to be seen with the naked eye on a clear night. They appear as bright, star-like objects in the night sky, without the need for a telescope.
Yes. It can also be seen without one.
It's best to look at them through a telescope at night.