@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/dk7kz2L26V https://t.co/vlurPz6bBo

@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/dk7kz2L26V https://t.co/vlurPz6bBo