Scientific American

This “extraordinary” event was likely caused by seismic waves bouncing off Earth’s core, researchers found

Fathers show changes in some of the same brain areas as mothers, but the effect of parenthood on dads isn’t nearly as well studied

The Trump administration wanted the surface of the Lincoln Memorial Reflecting Pool to be “American flag blue.” A water-treatment expert explains why the pool is still algal green and why the bloom could keep coming back

From tiny hamsters to giant salamanders, here are some of the most unusual examples of fatherhood across the animal kingdom

Construction of the Deep Synoptic Array is about to start in rural Nevada. It will reveal untold galaxies in stunning detail and help explain how they form and grow

Preliminary study finds that testosterone levels increase or stabilize in people taking GLP-1 medications

The great American brain drain could define science for a generation

Start your morning with today’s Spellements. Create as many words as you can from our daily selection of letters—including one tied to recent science news. Play now.

What’s going on with the Ebola outbreak, how the World Cup is dealing with rising temperatures, and how becoming a father can change your brain

How did we get here?

Influencers and ultra-rich people looking to extend their lifespan are trading tips and tricks on how to eke out extra years

This operation opens the door to treating more people living with HIV who have end-stage organ disease

Protein-packed diets add excess nitrogen to the environment through urine, rivaling pollution from agricultural fertilizers

People with “fearful” or “preoccupied” insecure attachment styles had more children, whereas securely attached people had fewer, according to a recent study

A galaxy appears to be missing the invisible substance thought to hold such objects together, further challenging long-held assumptions about how galaxies form

Famed AI wins in Go let human players rethink their moves in a whole new way

From booed hydration breaks to cooling-gel vests, teams are trying everything to keep their players from overheating. Physiologists—and one World Cup team doctor—say feeling cooler is different than cooling the body

The James Webb Space Telescope has found nearby brown dwarfs masquerading as far-distant galaxies. The discovery reinforces how, in astronomy, what you see isn’t always what you get

A new study captures how cork, wine and air interact over time

Astronomers may have found the remains of two long-dead stellar siblings

A new method that detects whether bones have been burned reveals Homo erectus brought fires into caves far earlier than previous evidence had suggested

The quest to approximate irrational numbers with fractions reveals hidden patterns, surprising hierarchies and enduring mathematical mysteries

Everyday viral infections may be quietly reshaping the body’s network of molecules that support cells and tissues in ways that can raise cancer risk over time

Some mathematicians have predicted when humanity’s downfall might occur—though the circumstances are unspecified

These ruins, located just five kilometers from Stonehenge, likely laid the groundwork for religious rites celebrating the longest and shortest days of the year

Next summer, NASA’s Lucy spacecraft will start sidling up to several asteroids near Jupiter. On its way there, it has studied another space rock up close

Mikhail Verbitsky was detained at an Armenian airport last Thursday on charges of inciting terrorism

Extremely curved spacetime can warp cause and effect, creating channels for backward communication

Researchers have created the first high-resolution global map of the extent of one of Earth’s largest—and least visible—living networks

A cold, cherry-blossom-hued exoplanet supports bizarre clouds chock-full of salts

Galapagos sharks have been spotted scrubbing off parasites with help from manta rays

Why the human brain can't fathom what it means to be a trillionaire

The first participant has been treated in a landmark clinical trial of cellular reprogramming, which aims to rejuvenate aging cells

Dogs spontaneously aid struggling humans the way young children do—whereas cats wait until they stand to benefit

The fossilized remains of more than 450 whales have amassed along a 750-mile-long stretch of the Indian Ocean floor

A step-by-step guide to the “Doginburgh Inventory,” a new pawedness test developed by dog behavior researchers