James' World 2

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In late 2019, paleontologists reported finding the fossil of a flattened turtle shell that “was possibly trodden on” by a dinosaur, whose footprints spanned the rock layer directly above. The rare discovery of correlated fossils potentially traces two bygone species to the same time and place. “It’s only by doing that that we’re able to reconstruct ancient ecosystems,” one paleontologist told The New York Times.

The approach parallels the way cosmologists go about inferring the history of the universe. Like fossils, astronomical objects are not randomly strewn throughout space. Rather, spatial correlations between the positions of objects such as galaxies tell a detailed story of the ancient past. “Paleontologists infer the existence of dinosaurs to give a rational accounting of strange patterns of bones,” said Nima Arkani-Hamed, a physicist and cosmologist at the Institute for Advanced Study in Princeton, New Jersey. “We look at patterns in space today, and we infer a cosmological history in order to explain them.”

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If you ask her husband, Dr. Lisa Feldman Barrett has just written the first neuroscience beach read. But Dr. Barrett considers her new book, Seven and a Half Lessons About the Brain, more of a choose-your-own-adventure, a chance to distill her favorite dinner party stories about the mind—from how our big gray blobs evolved to the myth of the “lizard brain”—into a witty and information-packed page-turner.

“At a time where science is under attack in some political circles, I wanted to show people that it can be useful and interesting. Science may not be a perfect endeavor, but it’s still the best way we have for learning about ourselves and the world.”

That’s part of why she challenged herself to turn her typical scientific writing—“extremely technical, filled with gazillions of references”—into a series of essays that reflect a more conversational approach.

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The brain

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Score one for the human brain. In a 2018 study, computer scientists found that artificial intelligence systems fail a vision test a child could accomplish with ease.

“It’s a clever and important study that reminds us that ‘deep learning’ isn’t really that deep,” said Gary Marcus, a neuroscientist at New York University who was not affiliated with the work.

The result takes place in the field of computer vision, where artificial intelligence systems attempt to detect and categorize objects. They might try to find all the pedestrians in a street scene, or just distinguish a bird from a bicycle (which is a notoriously difficult task). The stakes are high: As computers take over critical tasks like automated surveillance and autonomous driving, we’ll want their visual processing to be at least as good as the human eyes they’re replacing.

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Wisdom is full of paradoxes. It is one of the oldest topics in the intellectual history of humanity, and yet talking about wisdom can feel odd and disingenuous. People seem to have intuitions about who is and isn’t wise, but if you press them to define wisdom, they will hesitate. Wisdom, with its mystical qualities, sits on a pedestal, inspiring awe and trepidation, a bit of hushed reverence thrown in. It’s easy to distill wisdom’s archetypes in history (druids, Sufi sages) or popular culture (Star Wars’ Yoda, or Harry Potter’s Dumbledore), but harder to apply to the person on the street. Most people would agree that wisdom is desirable, yet what exactly is it?

It’s tempting to claim that the interest in wisdom emerged with the advent of particular Far Eastern philosophical traditions such as Buddhism, Hinduism, Taoism, each emphasizing lives of sages and ways to make sense of one’s existence in the ever-changing world. Of course, neither the concept of sages nor the process of making sense of the world is specific to a particular school of thought – most religions and ideologies have their own sages and saints, and attempt to provide a certain worldview. The truth is, the concept of wisdom is incredibly ancient, and not unique to any specific culture or way of being.

For instance, more than 5,000 years ago in ancient Mesopotamia, the Moon-god Nanna, the Lord of Wisdom, symbolized the sum of all other Sumerian deities’ powers, including foresight, justice, fertility, and love. Wisdom was a prominent topic in ancient Egyptian and Jewish texts and featured as a requirement in advising professions such as divinity, sorcery, or at the pharaoh’s court. In his Maxims, the ancient Egyptian vizier Ptahhotep described guidelines for sustaining social order, achieving political success, and cultivating self-control – in other words, the skills of wisdom. In the Old Testament’s Book of Ecclesiastes, where life is beyond comprehension, wisdom recognizes the limits of knowledge.

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Wisdom

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What does it feel like to be both alive and dead?

That question irked and inspired Hungarian-American physicist Eugene Wigner in the 1960s. He was frustrated by the paradoxes arising from the vagaries of quantum mechanics—the theory governing the microscopic realm that suggests, among many other counterintuitive things, that until a quantum system is observed, it does not necessarily have definite properties. Take his fellow physicist Erwin Schrödinger’s famous thought experiment in which a cat is trapped in a box with poison that will be released if a radioactive atom decays. Radioactivity is a quantum process, so before the box is opened, the story goes, the atom has both decayed and not decayed, leaving the unfortunate cat in limbo—a so-called superposition between life and death. But does the cat experience being in superposition?

Wigner sharpened the paradox by imagining a (human) friend of his shut in a lab, measuring a quantum system. He argued it was absurd to say his friend exists in a superposition of having seen and not seen a decay unless and until Wigner opens the lab door. “The ‘Wigner’s friend’ thought experiment shows that things can become very weird if the observer is also observed,” says Nora Tischler, a quantum physicist at Griffith University in Brisbane, Australia.

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