23 October 2026

Anthropology · Human evolution

Ancient proteins give the Denisovans a face

In Nature, Qiaomei Fu's team in Beijing found a Denisovan-only collagen mutation in Chinese fossils up to 200 thousand years old. Now we know their shared look: a low skull, a massive brow, flat cheeks.

• The proteome of Middle Pleistocene Xujiayao and common Denisovan morphology Nature · 21 Oct 2026 · Primary · Xing et al. (IVPP, Chinese Academy of Sciences), Nature 2026; open access

Neuroscience · Brain mapping

A four-part map of the brain's insula

Stanford's Josef Parvizi and team mapped the human insula in Nature, using electrodes in 87 neurosurgery patients. Two back regions handle pain, heat and touch, one handles nausea and anxiety, and the front one steers the rest.

• Functional architecture of the human insula Research Square (preprint) · 21 Oct 2026 · Primary · Quabs et al. (Stanford University); published in Nature, 21 Oct 2026; free preprint, CC BY 4.0

Evolution · Birds

Swiss barn owls are evolving, fast

Over 30 years, Swiss barn owls got darker and more spotted. University of Lausanne researchers sequenced 3,102 owl genomes, in Nature Communications. At one key gene, chance alone can't explain the shift: selection is at work.

• Barn owls are gradually changing colour University of Lausanne · 21 Oct 2026 · Primary · University of Lausanne press release; paper: Cumer et al., Nature Communications 2026
• Genomic bases of short-term evolution in wild barn owls revealed by long-term monitoring and population-scale sequencing Nature Communications · 12 Oct 2026 · Primary · Cumer et al., Nature Communications 2026; open access

Ocean · Plankton

Acidifying seas starve diatoms of silicon

With decades of data from Tatoosh Island, Washington, University of Chicago ecologists report in Nature Communications: as seawater acidified, dissolved silicon and chlorophyll fell. Diatoms, up to 40 percent of ocean productivity, need silicon for their glass shells.

• A quarter century of data reveals a new consequence of rising CO2 on the ocean food chain University of Chicago Biological Sciences · 22 Oct 2026 · Primary · University of Chicago press release; paper: Wootton, Pfister et al., Nature Communications 2026
• Ocean acidification, reduced silicate availability and declines in Ocean productivity Nature Communications · 22 Oct 2026 · Primary · Wootton, Pfister et al., Nature Communications 2026; open access

Idea · Deep time

Proteins outlast DNA

Why did proteins, not DNA, reveal that face? DNA is a long, fragile chain that breaks apart with time and heat. Proteins in bone and tooth enamel are tougher, and their amino acids still carry a trace of the genes behind them. The oldest DNA read so far, from Greenland sediments, is about two million years old. Proteins from rhino enamel in Canada's Arctic: over twenty-one million. Ten times deeper.

Kjær et al., Nature 2022 · Paterson et al., Nature 2025

• A 2-million-year-old ecosystem in Greenland uncovered by environmental DNA Nature · 7 Dec 2022 · Primary · Kjær et al. (2022)
• Phylogenetically informative proteins from an Early Miocene rhinocerotid Nature · 2025 · Primary · Paterson et al. (2025)

Idea · Evolution

Genetic drift: evolution by luck

Not every change in a species is adaptation. Some is luck. Each generation, some individuals leave more offspring by chance, not because they are better. That is genetic drift, and it rules small populations. Simulate ten animals with a gene variant at fifty percent: within a few dozen generations it is lost, or everywhere. With a thousand animals, it barely moves. So the owl team tested their data against drift: only a shift bigger than chance means selection.

Understanding Evolution, UC Berkeley

• Genetic drift Understanding Evolution, UC Museum of Paleontology, UC Berkeley · Primary · UC Museum of Paleontology

Idea · Ocean chemistry

What ocean acidification really means

The ocean absorbs about 30 percent of the carbon dioxide we release. With water, it forms carbonic acid, which frees hydrogen ions, and more hydrogen ions means lower pH. Since the industrial revolution, surface pH has dropped by just 0.1, to about 8.1. Tiny? The scale is logarithmic: that is about 30 percent more acidity. The sea is still alkaline, but fewer carbonate ions are left for shell builders.

NOAA, Ocean acidification

• Ocean acidification NOAA Education · Primary · NOAA