CAPE CANAVERAL, Fla. (AP) — In our solar system family, Mars is Earth’s next-of-kin, the next-door relative that has captivated humans for millennia. The attraction is sure to grow with Monday’s arrival of a NASA lander named InSight.

(Photo Bill Ingalls/NASA via Getty Images)

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InSight should provide our best look yet at Mars’ deep interior, using a mechanical mole to tunnel 16 feet deep to measure internal heat, and a seismometer to register quakes, meteorite strikes and anything else that might start the red planet shaking.

(Photo by NASA/JPL-Caltech/University of Arizona via Getty Images)

Scientists consider Mars a tantalizing time capsule. It is less geologically active than the twice-as-big Earth and so retains much of its early history. By studying the preserved heart of Mars, InSight can teach us how our solar system’s rocky planets formed 4 1/2 billion years ago and why they turned out so different.

VANDENBERG AIR FORCE BASE, CA – MAY 03: Bruce Banerdt, InSight principal investigator, NASA JPL, discusses NASA’s InSight mission during a prelaunch media briefing, Thursday, May 3, 2018, at Vandenberg Air Force Base in California. InSight, short for Interior Exploration using Seismic Investigations, Geodesy and Heat Transport, is a Mars lander designed to study the “inner space” of Mars: its crust, mantle, and core. (Photo Bill Ingalls/NASA via Getty Images)

“Venus is hot enough to melt lead. Mercury has a sunbaked surface. Mars is pretty cold today. But Earth is a nice place to take a vacation, so we’d really like to know why one planet goes one way, another planet goes another way,” said InSight’s lead scientist Bruce Banerdt of NASA’s Jet Propulsion Laboratory in Pasadena, California.

Today’s Earthlings are lured to Mars for a variety of reasons.

(Photo by Robyn Beck / AFP) (Photo credit should read ROBYN BECK/AFP/Getty Images)

Mars — “an incredible natural laboratory” — is reasonably easy to get to, and the U.S., at least, has a proven track record there, noted Lori Glaze, NASA’s acting director of planetary science.

The cherry on top is that Mars may have once been flush with water and could have harbored life.

(Photo by NASA/JPL-Caltech/Univ. of Arizona via Getty Images)

“Trying to understand how life is — or was — distributed across our solar system is one of the major questions that we have,” Glaze said Wednesday at a news conference.

“Are we alone? Were we alone sometime in the past?”

(Photo by David McNew/Getty Images)

In two years, NASA will actually seek evidence of ancient microbial life on Mars — if, indeed, it’s there.

On Monday, the space agency announced Jezero Crater as the landing site for the Mars 2020 rover, which will gather samples and stash them for a return to Earth in the early 2030s. The crater’s ancient lake and river system are brimming with diverse rocks, making it a potential hot spot for past life.

(Photo by David McNew/Getty Images)

Repeat, past life. NOT present.

WASHINGTON, DC – NOVEMBER 05: Michael Meyer (L), Lead Scientist for NASA’s Mars Exploration Program discusses recent findings by the MAVEN mission at NASA headquarters November 5, 2015, in Washington, DC. During one year that NASA’s Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft has been investigating Mars, evidence was found of solar flares stripping away atoms in the planet’s atmosphere. (Photo by Win McNamee/Getty Images)

Michael Meyer, NASA’s lead scientist for Mars exploration, said the Martian surface is too cold and dry, with too much radiation bombardment, for life to currently exist.

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Recorded observations of Mars — about double the size of Earth’s moon — date back to ancient Egypt. But it wasn’t until the 19th century that Mars mania truly set in.

Circa 1880: Italian astronomer and senator, Giovanni Virgino Schiaparelli (1835 – 1910). (Photo by Hulton Archive/Getty Images)

Italian astronomer Giovanni Schiaparelli began mapping Mars in the 1870s and described the observed channels as “canali” — Italian for channels. But with the recently completed Suez Canal on many minds, “canali” became understood as artificial, alien-made canals.

(Photo credit should read ROBYN BECK/AFP/Getty Images)

Adding to the commotion, the U.S. astronomer behind the Lowell Observatory near Flagstaff, Arizona, Percival Lowell, decided the channels were transporting water from the poles for intelligent civilizations living near the equator.

Lowell’s musings influenced H.G. Wells, author of “The War of the Worlds” in 1898. The 1938 radio broadcast of the science-fiction novel terrified many Americans who thought Martians were actually invading.

(Photo by Newsmakers)

Ray Bradbury’s classic 1950 novel, “The Martian Chronicles,” kept up the Mars momentum.

(Photo by Mario Tama/Getty Images)

Fast-forward to the 21st century, and SpaceX founder and science fiction enthusiast Elon Musk is leading a real-life charge to Mars. He envisions hundreds of thousands of people streaming to Mars in giant SpaceX ships and colonizing the red planet to continue the species.

Just this past week, Musk revealed new names for the interplanetary ships and booster rockets: Starship and Super Heavy.

(Photo by Mario Tama/Getty Images)

Musk is so passionate about Mars that he hopes to die there one day, although he stresses not on impact.

While NASA is holding out for its own Mars missions with crews, it has turned its more immediate attention back to the moon. An orbiting outpost near the moon could serve as an embarkation point for the lunar surface and even Mars, according to officials. It also would serve as a close-to-home proving ground before astronauts zoom 100 million miles to Mars.

(Photo by Brian van der Brug-Pool/Getty Images)

All the observations and reports coming back from NASA’s robotic explorers at Mars will help the human Mars pioneers, according to Thomas Zurbuchen, chief of science missions for NASA.

That’s the charm of Mars, according to scientists.

(Photo by NASA/JPL-Caltech/MSSS via Getty Images)

Going to Mars is “a dream,” said the French Space Agency’s Philippe Laudet, project manager for InSight’s seismometer. “Everything is captivating.”

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