Without new landers or rovers, it’s helicopters or bust for NASA’s Mars program. "For the first time in more than 30 years, NASA has no firm plans to send any new landers or rovers to Mars"
A major study will test automated oxygen in ambulances and helicopters - EurekAlert!
Exploring Valles Marineris on Mars with Helicopters, Not Rovers
Helicopters Could Map the Magnetic Fields on Mars
Helicopters Could Map the Magnetic Fields on Mars
How helicopters on Mars could find hidden magnetism in planet's crust
