Humanity's Long Journey to the Red Planet

Mars has captivated humanity for centuries — a blood-red dot in the night sky that ancient civilizations named after gods of war. Since the Space Age began, more missions have been aimed at Mars than any other planet. Some failed. Some made history. Together, they've built a portrait of a world that was once warm, wet, and possibly hospitable to life.

The Early Missions: Flybys and Orbiters (1960s–1970s)

The first successful Mars mission was Mariner 4 (NASA, 1964), which performed a flyby and returned 22 grainy but historic photographs — the first close-up images of another planet. What they showed was sobering: a cratered, apparently dead world, colder and thinner-atmosphered than many had hoped.

Mariner 9 (1971) went further, becoming the first spacecraft to orbit another planet. It revealed Martian volcanoes, canyons (including the enormous Valles Marineris), and crucially — evidence of ancient riverbeds suggesting liquid water once flowed on the surface.

First Landings: Viking 1 and Viking 2 (1976)

NASA's Viking program was a landmark achievement. Viking 1 and Viking 2 each consisted of an orbiter and a lander. For the first time, instruments sat on the Martian surface, measuring weather, analyzing soil, and even conducting biology experiments designed to test for signs of microbial life. The results were ambiguous and remain debated by scientists to this day, but no definitive evidence of life was found.

The Modern Era: Orbiters and Rovers

Mars Global Surveyor & Mars Odyssey

The 1990s and early 2000s brought a new wave of orbiters. Mars Global Surveyor (1996) mapped the entire planet in unprecedented detail. Mars Odyssey (2001) detected vast amounts of hydrogen just below the surface — a strong indicator of buried water ice.

Spirit and Opportunity (2004)

NASA's twin Mars Exploration Rovers were designed for 90-day missions. Spirit operated for over six years. Opportunity — extraordinarily — roamed the Martian surface for nearly 15 years before a global dust storm ended contact in 2018. Both confirmed that liquid water once existed on Mars.

Curiosity (2012–Present)

The Curiosity rover landed in Gale Crater and remains active today. Car-sized and nuclear-powered, it carries a sophisticated chemistry lab. Its greatest discovery: confirmation that Gale Crater was once a lake environment with the chemistry that could have supported microbial life.

Perseverance and Ingenuity (2021–Present)

NASA's most capable rover to date landed in Jezero Crater — an ancient river delta — with the explicit goal of searching for biosignatures (signs of past life). Key highlights include:

  • Collecting and caching rock core samples for a future Mars Sample Return mission
  • Producing oxygen from the Martian atmosphere via the MOXIE experiment
  • Deploying Ingenuity, the first powered aircraft to fly on another world, which far exceeded its planned five-flight demonstration

International Missions

Mars exploration is no longer solely a NASA endeavor. The European Space Agency's Mars Express has been orbiting since 2003. The UAE's Hope orbiter (2021) studies Martian weather. China's Tianwen-1 successfully landed the Zhurong rover in 2021, making China only the second nation to successfully operate a Mars surface vehicle.

What's Next?

The next great milestone is Mars Sample Return — a joint NASA/ESA mission to retrieve Perseverance's cached samples and bring them to Earth for laboratory analysis. Beyond that, human missions to Mars remain a long-term goal of NASA's Artemis-era planning and private ventures. The question driving it all remains: Was Mars ever alive? The answer may be waiting in the rocks Perseverance has already collected.