Nature Geoscience · 18 September 2026 · From issue 39

Experimental constraints on a long-lived magma layer at the Martian core-mantle boundary

In lab experiments, iron-rich melted rock at Mars-core pressures sank instead of rising.

Rémy Pierru, Steeve Gréaux et al.

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Also in issue 39 15 papers

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In math models, a new method estimates hidden equation values and how confident it is.
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Pesticide-resistant pests keep leftover poison, which harms wasps that grow inside them.
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A sticky coating let unencapsulated solar cells keep 94% of their power after 10,190 hours of aging.
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A hidden, very hot gas cloud may surround a nearby galaxy, invisible to X-ray telescopes.
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In lab tests, a superconducting material kept a memory of its electrical state for a long time.
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In lab tests, a bouncy nanotube foam kept a lasting memory of past squeezing, like a hard drive.
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In lab tests, a chemical fuel moved a phosphate group along a molecular track for hours.
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A checkout health rule raised healthy product placement from 50% to 67% near the register.
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In an artificial lymph vessel, wave-like squeezing plus one-way flaps reliably pump fluid in one direction.
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In young zebrafish, a tuned virus traced up to 20 brain cell connections per starting cell.
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