Scientific American 2022 04.pdf

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APRIL 2022
SCIENTIFICAMERICAN.COM
Searching the Sky
for Dark Matter
Resurrecting
Rivers
Discovering
Jerusalem’s
History
QUANTUM
NAVIGATION
New research is revealing
the biophysical basis
of birds’ incredible
migration skills
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B I O P H Y S I C A L C H E M I S T RY
26 The Quantum Nature
of Bird Migration
Migratory birds travel vast distances
between their breeding and
wintering grounds. New research
hints at the biophysical under­
pinnings of their internal naviga­
tion system.
By Peter J. Hore and
Henrik Mouritsen
A S T R O N O MY
discovery of neurons and the
origins of modern brain science.
By Benjamin Ehrlich
A STROPHYSIC S
58 Scanning the Cosmos
for Dark Matter
Signals from space may point the
way to the universe’s hidden realm.
By Chanda Prescod-Weinstein
A R C H A E O LO G Y
32 Women Take On the Stars
A new wave of astronomers are
leading a revolution in scientific
culture.
By Ann Finkbeiner
ENVIRONMENT
66 The New Archaeology
of Jerusalem
Even as biblical archaeology gets
a high­tech makeover, a new gener­
ation of scholars remain haunted
by ancient scripture and riven by
modern politics.
By Andrew Lawler
P S YC H O LO G Y
40 Creek Revival
Radical reconstruction in Seattle
is bringing nearly dead urban
streams back to productive life.
By Erica Gies
H I S TO RY O F S C I E N C E
ON THE C OVE r
Every year billions of birds travel long distances
between their breeding and wintering grounds.
Scientists have known for a while that they use
the sun and stars to navigate. But birds also
use Earth’s magnetic field to orient themselves.
New research suggests that their magnetic
compass relies on quantum physics.
illustration by Kyle Bean.
74 Nap Like a Genius
Thomas Edison jolted himself from
the edge of sleep to boost creativity.
His method can work for the rest of
us, research indicates.
By Bret Stetka
50 Mysterious Butterflies
of the Soul
Santiago RamÓn y Cajal, the
Photograph by Jelle Wagenaar
April 2022, ScientificAmerican.com
1
4 From the Editor
6 Letters
8 Science Agenda
Protecting voting rights boosts suffrage, not fraud.
By the Editors
11 Forum
Oxygen levels in the oceans are the next great casualty
of climate change.
By Nathalie Goodkin and Julie Pullen
12 Advances
11
A tiny beetle’s supercharged flight. A mummy reunited
with her intricate coffins. DNA antennas to test new
drugs. Archaeology on the International Space Station.
24 Meter
The poetic musings of Schrödinger’s Cat.
By Peggy Landsman
25 The Science of Health
Local oncologists get help offering the latest cancer
treatments to patients.
By Claudia Wallis
78 Mind Matters
Personality and politics combine to make people
share fake news.
By Asher Lawson and Hemant Kakkar
12
80 Recommended
Pandemic grief in future worlds. Blurring the
boundaries of memory. Saving coral reefs.
The fraught beginnings of scientific publishing.
By Amy Brady
82 Observatory
In 60 years, the warnings of
Silent Spring
have not
prompted enough action.
By Naomi Oreskes
83 50, 100 & 150 Years Ago
By Mark Fischetti
84 Graphic Science
82
How rich countries dominate fossil research.
By Clara Moskowitz and Youyou Zhou
Scientific American (ISSN 0036-8733), Volume 326, Number 4, April 2022, published monthly by Scientific American, a division of Springer Nature America, Inc., 1 New York Plaza, Suite 4600, New York, N.Y. 10004-
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Scientific American, April 2022

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