Answer :
In the article "NASA Confirms Evidence That Liquid Water Flows on Today's Mars," the event that eventually led to the discovery of liquid water on Mars is as follows:
1. Lujendra Ojha noticed dark streaks on Mars in images from the MRO's High Resolution Imaging Science Experiment.
2. Lujendra Ojha interpreted the spectral signatures as coming from hydrated minerals called perchlorates.
3. Scientists discovered that perchlorates have been shown to keep liquids from freezing in extremely low temperatures.
4. Scientists conducted chemical mapping using MRO's Compact Reconnaissance Imaging Spectrometer for Mars.
So, the event that led to the discovery of liquid water on today's Mars was the interpretation of dark streaks as hydrated minerals called perchlorates by Lujendra Ojha, which eventually revealed the presence of liquid water on Mars.
1. Lujendra Ojha noticed dark streaks on Mars in images from the MRO's High Resolution Imaging Science Experiment.
2. Lujendra Ojha interpreted the spectral signatures as coming from hydrated minerals called perchlorates.
3. Scientists discovered that perchlorates have been shown to keep liquids from freezing in extremely low temperatures.
4. Scientists conducted chemical mapping using MRO's Compact Reconnaissance Imaging Spectrometer for Mars.
So, the event that led to the discovery of liquid water on today's Mars was the interpretation of dark streaks as hydrated minerals called perchlorates by Lujendra Ojha, which eventually revealed the presence of liquid water on Mars.
