NASA's Ingenuity Mars Helicopter is two days away from making humanity's first attempt at powered, controlled flight of an aircraft on another planet.
Mars had drier and wetter eras before drying up completely about three billion years ago, says a new study which suggests that the Red Planet did not dry up all at once.
Launched 20 years ago on April 7, the orbiter, which takes its name from Arthur C. Clarke's classic sci-fi novel "2001: A Space Odyssey", was sent to map the composition of the Martian surface, providing a window to the past so scientists could piece together how the planet evolved.
The rare Wolf-Rayet stars are highly luminous objects a thousand times that of the Sun and have intrigued astronomers for long, the Union Ministry of Science and Technology said in a statement on Tuesday.
The findings, published in the journal JAMA Network Open, showed that the blood types A, B, AB and O were not associated with disease susceptibility or severity.
NASA's Mars helicopter Ingenuity has survived its first cold Martian night on its own.
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