Investigate

William Frankland, Pioneering Allergist, Dies at 108

George Preti, 75, Dies; Studied Bodily Odors as Biological Clues

Life on the Planet Mercury? ‘It’s Not Completely Nuts’

Why Didn’t Saturn Eat Titan, Its Biggest Moon?

Red Space Lettuce Might Feed Red Planet Voyagers

Lunch With Freeman Dyson, in 196,883 Dimensions

Mr. Sun Is Ready for His Close-Up

Robert Moir, 54, Dies; His Research Changed Views on Alzheimer’s

A Dance That Stops 2 of Neptune’s Moons From Colliding

Mysterious Gas on Mars Gets Some Company

Joachim Messing, 73, Who Charted the DNA of Viruses and Plants, Dies

Sally Floyd, Who Helped Things Run Smoothly Online, Dies at 69

Neil Armstrong: First Man on the Moon, and Its First Great Geologist

An Emperor Penguin Colony in Antarctica Vanishes

‘Predatory’ Scientific Publisher Is Hit With a $50 Million Judgment

A Crew of Mini-Moons That Sculpts Saturn’s Rings

Trigger Warnings May Not Do Much, Early Studies Suggest

How Ultima Thule Is Like a Sticky, Pull-Apart Pastry

Sealed Cache of Moon Rocks to Be Opened by NASA

An Insect Flees Danger. Suddenly, It Picks Up a Tiny Hitchhiker.