New paper answers causation conundrum

In a new paper published in a special issue of the Philosophical Transactions of the Royal Society A, SFI Professor Jessica Flack offers a practical answer to one of the most significant, and most confused questions in evolutionary ...

How living systems compute solutions to problems

How do decisions get made in the natural world? One possibility is that the individuals or components in biological systems collectively compute solutions to challenges they face in their environments. Consider that fish ...

Monkey fights help explain tipping points in animal societies

Previous studies of flocks, swarms, and schools suggest that animal societies may verge on a "critical" point—in other words, they are extremely sensitive and can be easily tipped into a new social regime. But exactly how ...

Grasses, mammals, and their co-evolution

After millions of years of amphibians, dinosaurs, and early mammals ruling the forests and swamps of the hot, humid Mesozoic and early Cenozoic, a new habitat emerged. Small patches of grasslands sprang up and spread as the ...

Species' evolutionary choice—disperse or adapt?

Dispersal and adaptation are two fundamental evolutionary strategies available to species given an environment. Generalists, like dandelions, send their offspring far and wide. Specialists, like alpine flowers, adapt to the ...

New algorithm limits bias in machine learning

Machine learning—a form of artificial intelligence based on the idea that computers can learn from data and make determinations with little help from humans—has the potential to improve our lives in countless ways. From ...

A new normal: Study explains universal pattern in fossil record

Throughout life's history on earth, biological diversity has gone through ebbs and flows—periods of rapid evolution and of dramatic extinctions. We know this, at least in part, through the fossil record of marine invertebrates ...

Implications of no-free-lunch theorems

In the 18th century, the philosopher David Hume observed that induction—inferring the future based on what's happened in the past—can never be reliable. In 1997, SFI Professor David Wolpert with his colleague Bill Macready ...

Social animals have tipping points, too

In relatively cool temperatures, Anelosimus studiosus spiders lay their eggs and spin their webs and share their prey in cooperative colonies from Massachusetts to Argentina. Temperatures may vary, but the colonies continue ...

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