There’s no safe level of exposure to lead—but a small, strange study shows we’ve made incredible progress in recent decades ...

A tiny, plant-eating dinosaur about the same size of a chicken that occupied what’s now northern Spain some 125 million years ...

The sun is experiencing a violent solar storm, releasing one of the strongest solar flares seen in the past 30 years ...

The solar system’s most giant planet is slightly less of a giant than scientists once thought. Jupiter, a planet so huge it could hold 1,000 Earths, is 8 kilometers less wide at its equator and 24 ...

Elon Musk’s SpaceX is set to massively expand its orbital footprint in a bid to power next-generation artificial intelligence ...

After a year of protests from astronomers, authorities have abandoned plans for a giant, light-polluting renewable-energy ...

Florian Neukart is an assistant Professor of Physics at Leiden University. Florian holds a Ph.D. in Computer Science from the ...

This puzzle is known as the problem of time, and it remains one of the most persistent obstacles to a unified theory of ...

The National Reconnaissance Office has now declassified a satellite program used to spy on America’s adversaries ...

Dominique Charron is the vice-president, programs and partnerships at the International Development Research Centre, Canada.

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific ...

Mode = the most frequently occurring number in the set. (Note: if there are multiple most frequently occurring numbers in a dataset, the mode is not unique. All modes in this puzzle are unique) Range ...