The tiny red planet is a silent director of Earth's ice ages
In short: Mars is often dismissed as a small, distant neighbor with little influence on our world. However, new research suggests this featherweight planet acts as a gravitational conductor, orchestrating the long-term climate cycles and glacial shifts that have shaped Earth’s history for billions of years.
Despite being only one-tenth the mass of Earth and situated about 140 million miles away, Mars exerts a disproportionate influence on our planet's orbital mechanics. Research led by Stephen Kane at the University of California, Riverside, suggests that Mars is responsible for specific Milankovitch cycles—the variations in Earth’s orbit and tilt that determine how much solar energy reaches our surface. Kane utilized computer simulations to test these gravitational nudges. While the 430,000-year cycle driven by Venus and Jupiter remained stable without Mars, two other critical cycles vanished entirely when Mars was removed from the simulation: one lasting 100,000 years and another stretching 2.3 million years.
These specific cycles govern Earth's eccentricity (orbital shape), obliquity (axial tilt), and the timing of its closest approach to the Sun. These orbital shifts are the primary drivers behind the advance and retreat of permanent ice sheets at the poles. By subtly tugging on our path, Mars helps dictate when we enter and exit major ice ages. The study confirms that even a small planet can have significant geological consequences over millions of years, providing a new lens through which to interpret sediment layers on the ocean floor.
The research was announced on January 12, 2026, challenging previous assumptions that Mars's influence would be too negligible to observe in Earth's geologic history. By proving that these cycles disappear without Mars, scientists can better understand the fundamental mechanics of our planet's long-term climate patterns.
Opens the Intellect+ feed with this card first. Swipe up for the next one.
Sources
- Summary by Intellect · source: We Just Discovered That Mars Controls Earth’s Climate
- Also: Tiny Mars’ big impact on Earth’s climate
- Also: Tiny Mars's big impact on Earth's climate: How the red planet's pull shapes ice ages
To cite this card, link to https://intellectplus.co.uk/app/space-we-just-discovered-that-mars-controls-earth-s-climate.
How we source, check and correct cards: Editorial standards.
General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.
Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?
Related
More in Planetary science · More in Space · Latest · A–Z · All topics
