Scientific American

How did we get here?

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

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

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

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

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

The great American brain drain could define science for a generation

Can you crack Killer Sudoku's mathematical twist?

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

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

Put your science knowledge to the test with this week’s news quiz. Play now.

Tropical Storm Arthur is the first named storm of the Atlantic hurricane season and will bring heavy rains and potential flash flooding to the Southeast

Billions of emerging insects will likely trigger predator population surges—but some species mysteriously opt out of such bounties

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

Graves of hunter-gatherers in Siberia point to a deadly disease outbreak dating to some 5,500 years ago, a new DNA analysis finds

Some countries have seen a stark decline in academic freedom over the past decade

The effort to pull some 900 ocean-monitoring buoys and sensors from the water drew backlash from scientists and lawmakers

Robots and AI are running experiments around the clock, from battery chemistry to cancer therapies. But can they be trusted to get it right?

Early research suggests that some mental health conditions could stem from metabolic disorders. If so, the findings could change how we treat mental illness

This partnership marks the latest foray into space exploration for Relativity Space, which aims to build cheap, reusable rockets

Exploring ice cores to foresee the effects of climate change

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

Even if you aren’t going to be within the path of totality, you can still watch the solar eclipse as it happens with Scientific American

Scientific American used expert recommendations and data analysis to identify 28 exceptional early-career researchers

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

People are increasingly turning to AI for mental health support—but its design is “antithetical” to mental health care, experts say

There are bright futures ahead for our first-ever Young American Scientist honorees

On Thursday Knicks fans are flocking to Manhattan for a ticker-tape parade. But where did ticker tape even come from?

Neuroscientist Kauê M. Costa talks about surprising results that are changing how we think dopamine works and how the brain really learns

Fable 5 was built to help with advanced cybersecurity work. Its sudden shutdown highlights a dilemma at the heart of AI security: the same tools can aid both defenders and attackers

The Trump administration is mulling new rules that would give political appointees final say on research grants

Novo Nordisk said this security incident affected patient data, including health information and birth year

These young scientists are making waves in their own ways. Keep an eye on them—great things are ahead

This sparkling galaxy is home to a set of supernova remnants that showed variable brightnesses over 14 years of data

The noted aging researcher talks about how scientists are like birds

Understanding the behavior of supermassive black holes

The science historian talks about scientific integrity and public opinion

Making catalysts used in industrial processes hardier and more effective

Despite funding woes, American scientists are finding reasons for optimism

The Nobel laureate on why the U.S. needs to treat scientific research as an essential part of the nation’s infrastructure

Clocking the electrical messages between neurons using fluorescence

It’s a complicated time to be a young scientist in America. Lessons from history can tell us what the future might hold

Developing artificial-intelligence systems to enhance digital art creation

The HBCU president on the role of academic institutions in American innovation

Scientists have modeled the potential size of this current outbreak, which some experts think could become one of the worst Ebola epidemics on record

Learning how the matrix around cells and tissues impacts cancers