Scientific American - USA (2022-04)

April 2022, ScientificAmerican.com 55 called them, “whose beating of wings may one day reveal to us the secrets of the mind.” He ...

56 Scientific American, April 2022 LAYERS OF CELLS from the retina. Cajal made studies of sections of retina from different anim ...

April 2022, ScientificAmerican.com 57 etrable and indefinable,” he wrote, “why not revert to the study of the young wood in the ...

58 Scientific American, April 2022 ASTROPHYSICS Signals from space may point the way to the universe’s hidden realm By Chanda Pr ...

April 2022, ScientificAmerican.com 59 ...

60 Scientific American, April 2022 If I disappointed her with my answer, she didn’t show it. Instead she asked me to sit down to ...

Graphic by Matthew Twombly April 2022, ScientificAmerican.com 61 tific projects to a congressionally mandated panel that will de ...

62 Scientific American, April 2022 these galaxy-halo systems surpasses the amount of mat- ter in the stars and planets and gas. ...

Graphic by Jen Christiansen April 2022, ScientificAmerican.com 63 But when Mark, Alan and I sat down to check how Sikivie’s grou ...

64 Scientific American, April 2022 NASA/CXC/CfA/M. Markevitch ( x-ray ), NASA/STScI, Magellan/U. Arizona/ D. Clowe ( optical and ...

April 2022, ScientificAmerican.com 65 gest that these dense spinning stars produce axions when protons and neutrons collide in t ...

ARCHAEOLOGY THE NE W ARCHAEOLOGY OF JERUSA LEM JERUSALEM’S OLD CITY is home to key holy sites for Judaism, Islam and Christianit ...

Even as biblical archaeology gets a high-tech makeover, a new generation of scholars remain haunted by ancient scripture and riv ...

68 Scientific American, April 2022 Simon Norfolk ( all photographs ) Since the 1830s treasure hunters, religious enthusiasts and ...

April 2022, ScientificAmerican.com 69 villages, wells and streams in the region around Jerusalem to bib- lical texts to demonstr ...

70 Scientific American, April 2022 ties for investigators. Naturally crumbly, limestone landscapes har- bor subterranean caves a ...

April 2022, ScientificAmerican.com 71 and even the ancient world’s most impressive pedestrian overpass, all dating to the era of ...

72 Scientific American, April 2022 Those imports fell off much later, probably because warfare between competing Hellenistic kin ...

April 2022, ScientificAmerican.com 73 partnered with the country’s Weizmann Institute of Science in Rehovot to gather large numb ...

THOMAS EDISON naps under a tree in 1921, while U.S. President Warren Harding ( seated, right ) reads a newspaper. ...