Could Life Have Survived in Mars's Ancient Lake?

The video explores the history of Gale Crater on Mars, which was once an ancient lake that may have supported life due to its stratified layers and varying oxygen levels. Researchers used data from the Curiosity Rover to study the sedimentary rocks, revealing insights into the Martian climate and potential habitability. The video also discusses a breakthrough in observing gravitational microlensing, proving part of Einstein's theory of general relativity. Using the Hubble Space Telescope, scientists observed a star's gravitational effect on another star's light, providing new insights into the mass of the white dwarf Stein 2051 B.

Discuss the role of sedimentary rocks in understanding the history of Gale Lake.

What changes in Martian climate were observed above Gale Lake?

Explain the concept of gravitational microlensing as described in the text.