Welcome to our top 10 earthlike roundup of Mars, the Red Planet that surprisingly mirrors many of Earth’s quirks. Though its sky is crimson and its air thin, the planet shares a surprising number of Earth‑like traits that make scientists daydream about future colonies.
Why These Top 10 Earthlike Facts Matter
10 Mars Has Four Seasons
Just like our home planet, Mars experiences a full set of four seasons. The twist, however, is that the length of each season isn’t the neat three‑month package we enjoy on Earth; instead it hinges on which hemisphere you’re looking at.
A Martian year stretches over 668.59 sols – a sol being a solar day on Mars – equating to roughly 687 Earth days, almost double the time it takes Earth to orbit the Sun. In the planet’s northern half, spring drifts on for about seven Earth months, summer lingers for six, autumn lasts around 5.3 months and winter hangs around a little over four months.
Even though the Martian summer in the north stays stubbornly chilly – rarely breaking the –20 °C (‑4 °F) mark – the southern summer can be a full 30 °C (54 °F) warmer. This dramatic temperature swing fuels the massive dust storms that sometimes cloak the entire planet.
9 Mars Has Its Own Aurora
The dazzling aurora displays that many of us associate with polar skies aren’t exclusive to Earth. Mars puts on its own light show, although it’s a bit of a stealth performer – the glow is largely ultraviolet, invisible to the naked human eye.
Scientists captured this ghostly display using a special instrument aboard the MAVEN spacecraft (Mars Atmosphere and Volatile Evolution). While Earth’s auroras result from charged electrons slamming into our atmosphere, the Martian version is sparked by solar‑wind protons colliding with a thin cloud of hydrogen that surrounds the planet.
Our planet’s robust magnetic field deflects most of the solar wind, keeping us safe from such a UV‑only aurora. Yet Mars, lacking a global magnetic shield, lets the phenomenon shine. Researchers suspect that other bodies without magnetic fields – like Venus and Saturn’s moon Titan – might host similar hidden auroras.
8 A Martian Day Is Barely Longer Than An Earth Day
When we talk about a planet’s day, we’re really talking about how long it takes to spin once on its axis. The faster the spin, the shorter the day. These rotation periods differ wildly across the solar system.
Our Earth enjoys a tidy 24‑hour day. Jupiter whizzes by with a 9‑hour, 55‑minute, 29.69‑second rotation. Venus takes a leisurely 116‑day spin. Mars, meanwhile, clocks in at 24 hours and 40 minutes – just a smidge longer than ours.
So why do Earth and Mars share such similar day lengths? Pure chance, really. Planetary spins are set during formation when swirling dust clouds lose momentum. Collisions with other bodies can speed up or slow down a planet’s rotation. Once a planet clears its neighborhood, the spin it held after its last major impact tends to stick.
7 Mars Has Water
Back in 2008, NASA’s Mars Reconnaissance Orbiter (MRO) spotted streams of liquid trickling down certain Martian slopes. This water only flows during the planet’s summer, freezing solid when the colder season rolls in.
Even though Martian summers are chilly compared to Earth’s, researchers have identified bright streaks where temperatures climb above –23 °C (‑10 °F). One would expect water to stay frozen at those temps, yet it appears to be flowing.
Scientists think the secret lies in salt. Salty water freezes at lower temperatures than fresh water, so a briny mixture could stay liquid under those conditions. Another idea is that contact between salt and ice creates meltwater, similar to how road salt works on Earth. The exact source – whether melting ice, underground reservoirs, or atmospheric vapor – remains under investigation.
6 Mars Has Polar Ice Caps And Glaciers
Just like Earth, both the northern and southern poles of Mars are capped with ice. Beyond these polar caps, the planet also boasts belts of glaciers situated at mid‑latitudes. These icy formations were hidden for a long time beneath a thick veil of dust.
The dusty blanket likely protects the glaciers from evaporating. Mars’ extremely low atmospheric pressure means any exposed water or ice would sublimate straight into vapor. The dust acts as an insulating shield, slowing that process.
Researchers estimate that Mars holds over 150 billion cubic meters (about 5.3 trillion cubic feet) of ice – enough to blanket the entire surface with a layer roughly one meter (3.3 ft) deep. Whether this ice is pure water, frozen mud, or carbon‑dioxide ice is still a matter of study.
5 Mars Has Its Own Falls
Analyzing high‑resolution images from the MRO, scientists uncovered a spectacular geological feature that mirrors Earth’s waterfalls – only it’s a cascade of molten rock. This “lava waterfall” erupts from four distinct vents within a 30‑kilometer‑wide (19‑mile) crater in the Tharsis volcanic province.
The lava behaves much like water, flowing outward from the vents, but it moves far more slowly because molten rock is viscous and highly temperature‑sensitive. The result is a breathtaking, river‑like display of bright orange fluid spilling down the crater walls.
While the visual similarity to Earth’s waterfalls is striking, the underlying physics differ greatly – lava’s density and cooling rate make it a much slower, more dramatic process than liquid water.
4 Mars Is The Only Habitable Planet Besides Earth
Planets in our solar system fall into two broad families: terrestrial worlds with solid, rocky surfaces (Mercury, Venus, Earth, and Mars) and gas giants composed mostly of thick, poisonous atmospheres (Jupiter, Saturn, Uranus, Neptune). Only Earth is known to host life as we understand it.
Mars ranks as the next best candidate. While it lacks the thick, breathable atmosphere and surface pressure of Earth, its rocky terrain and evidence of water make it the most “habitable” of the remaining planets. The other worlds are either scorching, crushing, or both – Mercury scorches from its proximity to the Sun, while Venus traps heat in a dense carbon‑monoxide envelope and exerts crushing atmospheric pressure.
Human colonization of Mars would demand sophisticated life‑support gear. One bold proposal involves installing a massive magnetic generator between Mars and the Sun, creating an artificial magnetosphere to shield the planet from solar wind. This could preserve the atmosphere, raise pressure, warm the climate, and trigger a greenhouse effect that would melt polar ice and release CO₂, potentially generating flowing water.
Despite the allure, we lack the technology to build such a planetary‑scale magnetic shield, keeping the dream firmly in the realm of future engineering.
3 Mars’s Landforms May Have Developed Like Some Islands Form On Earth
Although rare, new islands can suddenly erupt from the ocean when underwater volcanoes burst. In the past 150 years, scientists have witnessed three such islands appear, the most recent being Hunga Tonga‑Hunga Ha’apai, which sprang up off the coast of Tonga in the South Pacific.
NASA kept a close eye on this nascent island, expecting it to sink back beneath the waves quickly. Instead, the island persisted, prompting researchers to study why. They discovered that the island’s foundation solidified when salty seawater reacted with volcanic ash, creating a stable rock‑like base.
These observations offer clues about Mars. Scientists think the Red Planet’s ancient landforms may have started as watery, unstable structures that gradually solidified as mineral‑rich brines interacted with volcanic material, eventually becoming the rugged terrain we see today.
2 Mars Might Contain Life
Although no definitive proof of life has been found on Mars, multiple lines of evidence keep the possibility alive. The Curiosity rover detected organic molecules in rocks from Gale Crater – a region that once hosted a lake roughly 3.5 billion years ago.
All living organisms share four fundamental organic components: proteins, nucleic acids, fats, and carbohydrates. While the presence of these molecules hints at past biology, they can also arise from non‑biological processes, leaving the question open.
Adding intrigue, scientists have measured methane in the Martian atmosphere. On Earth, most methane originates from biological activity. Mars’ methane, however, is short‑lived – lasting only a few hundred years – meaning something must be replenishing it.
Potential sources include abiotic chemical reactions or microbial life. Interestingly, methane levels rise during the Martian summer and dip in winter, a pattern not observed in Earth’s biological methane cycles, further deepening the mystery.
1 Plants Could Grow On Mars
NASA believes agriculture on Mars could become a reality. In partnership with Peru’s International Potato Center, researchers built a sealed chamber that mimics Martian conditions and successfully cultivated potatoes.
However, the experiment wasn’t flawless. The soil used came from Peru’s Pampas de la Joya desert and, despite sterilization, may have contained microbes that helped the potatoes thrive. Moreover, the potatoes were propagated from cut pieces rather than seeds – a method that would be impractical for actual Martian missions, as transporting delicate cuttings is risky.
At Villanova University, students grew lettuce, kale, garlic, and hops in a simulated Martian substrate made from volcanic basalt. Unfortunately, the potatoes didn’t survive because the substrate was too dense. Real Martian soil, known as regolith, contains perchlorates – toxic compounds that can be lethal to humans.
Good news: perchlorates can be removed by washing the regolith with water or by employing perchlorate‑eating bacteria, which also release oxygen as a by‑product. Another hurdle is sunlight. Mars receives only about half the solar energy Earth does, and much of it is filtered by a dusty atmosphere. Additionally, intense ultraviolet radiation bombards the surface, posing another challenge for plant growth.