There are similarities between Mars and Earth. It has a 24-hour day and four seasons. Though its air is too thin to breathe, and its surface too cold for unsheltered life...

When will humans get to Mars? Sending astronauts to Mars is a daunting prospect. But this will not deter NASA and private companies from trying to put humans on the red planet.

When will humans get to Mars?

when-will-humans-get-to-mars

Let's do English ESL deep listening: focus on meaning. There are similarities between Mars and Earth. It has a 24-hour day and four seasons. Though its air is t…