@CNN: After years of research, scientists have confirmed that liquid water exists on Mars. This could allow humans to further explore the red planet. https://t.co/7EkqdWMSII https://t.co/td5GJD1Rnu

@CNN: After years of research, scientists have confirmed that liquid water exists on Mars. This could allow humans to further explore the red planet. https://t.co/7EkqdWMSII https://t.co/td5GJD1Rnu