New findings from NASA’s Mars Reconnaissance Orbiter (MRO) provide the strongest evidence yet that liquid water flows intermittently on present-day Mars.

Using an imaging spectrometer on MRO, researchers detected signatures of hydrated minerals on slopes where mysterious streaks are seen on the Red Planet. These darkish streaks appear to ebb and flow over time. They darken and appear to flow down steep slopes during warm seasons, and then fade in cooler seasons. They appear in several locations on Mars when temperatures are above minus 23 Celsius, and disappear at colder times.

“Our quest on Mars has been to ‘follow the water,’ in our search for life in the universe, and now we have convincing science that validates what we’ve long suspected,” said John Grunsfeld, astronaut and associate administrator of NASA’s Science Mission Directorate in Washington. “This is a significant development, as it appears to confirm that water – albeit briny – is flowing today on the surface of Mars.”

source: www.nasa.gov 

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Fill in the gaps with the verbs from the table and use the appropriate tenses.

1. Research has just ……… that our assumption has been true all along.

2. I didn’t want the relationship to ……… away slowly, so I ended it immediately. 

3. The private detective has ………. serious evidence against the CEO, evidence that we can use in court.

4. I never ……… that she was responsible for the downfall.

5. The team couldn’t …….. any sign of life among the ruins.

6. The sea is sure to …….. and flow.

key: 1-confirmed, 2-fade, 3-provided, 4-suspected, 5-detect, 6-ebb 

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