Janet wants to know if any form of life has ever existed on Mars.
How do the two sources differ on where evidence of life would be located on Mars?
1. Source 1 says that NASA has discovered life on Mars. Source 2 says Mars has had water in the past.
2. Source 1 says that moisture from clouds is a water source on Mars. Source 2 says that the water on Mars is in liquid form.
3. Source 1 says that evidence of life would be found below the surface. Source 2 says that radiation has destroyed any sign of life on
Mars.
4. Source 1 says that any evidence of water on Mars could be found on its surface. Source 2 says the evidence would be found below
the surface.