Scientific American

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

Knowing what kind of tick bit you and where you got it can help inform next steps

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

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

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

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.

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

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

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

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

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

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

How did we get here?

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

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

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

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

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

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 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

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

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

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