Science & Tech

The merger of two black holes and the gravitational waves that ripple outward as the black holes spiral toward each other. The black holes-which represent those detected by LIGO on Dec. 26, 2015-were 14 and 8 times the mass of the sun, until they merged,
How Do Black Holes Work?

What’s really going on inside those terrifying faraway entities?

LIGO/T. Pyle
Illustration of human head with brain waves (medicine, medical, anatomy).
© Andrea Danti/Fotolia
Are There Really Right-Brained and Left-Brained People?

The notion that the right half of the brain is the creative half and the left half is the analytical half and that our individual traits are determined by which half is dominant is widespread in popular psychology. 

© Andrea Danti/Fotolia

Editor's Picks

The surgeon (doctor) makes an incisin on a patient (a girl's) abscess on her forearm using a vintage medical device a trocar or knife. blood
7 Scary Surgical Instruments, Then and Now
Trepans and gorgets and speculums, oh my!
Atom illustration. Electrons chemistry physics matter neutron proton nucleus
What Is Antimatter?
We know all about matter, but what about its evil twin?
The SpaceX Dragon commercial cargo craft is grappled by the International Space Station's Canadarm2 robotic arm. October 10, 2012.
6 Signs It’s Already the Future
If you thought future tech was just for sci-fi flicks, hold on to your non-rocket-powered seats.
Sledgehammer breaking rocks. (demolishing, crushing, blurred motion)
Can Anything Break if You Hit It Hard Enough?
If you hit it with enough force, or hit it in just the right way, anything except for an elementary particle can break.
The International Space Station photographed against the Rio Negro, Argentina, from the shuttle orbiter Atlantis, February 16, 2001.  Atlantis' primary mission was to deliver the Destiny laboratory module, visible at the leading end of the station.
Everyday Stuff Developed by NASA
How much of your stuff could be used in space?
Little boy drinking a glass of milk outdoors.  child food
Why Did Adult Humans Start Drinking Milk?
Could ancient famines have driven the spread of lactose tolerance?
invariance of the speed of light
Relativity, wide-ranging physical theories formed by the German-born physicist Albert Einstein. With his theories of special relativity (1905) and general relativity (1915), Einstein overthrew many assumptions underlying earlier physical theories, redefining in the process the fundamental concepts
Above the clouds 130 nautical miles below, astronaut Mark C. Lee floats freely without tethers as he tests the new Simplified Aid for Extravehicular Activity (EVA) Spacewalk Rescue (SAFER) system, Sept. 16, 1994. Space Shuttle Discovery, STS-64
Gravity: From Apples to the Universe
How our ideas of gravity have changed from Aristotle to the present day.

Spotlight: Invasive Species

You probably encounter an invasive species every day and don't even notice. They can be cute like a rabbit, stunning like lantana, or as tiny as bacteria. And they're doing a real number on the planet, costing the global economy more than $423 billion each year, according to a new report.


Human eyelashes under magnifcation. Colored scanning electron micrograph (SEM) of human eyelash mites
Name That Magnified Object!
Can you figure out what these common items are when they're extremely magnified?
3d illustration of small intestines, human body, anatomy
Guess the Body Part Quiz
Taking this quiz requires guts.
Name that Thing - Science, composite: circuitboard, gnomon, eye iris, airplan yaw
Name That Thing: Science
Do you know the difference between a protractor and a compass?
Close up of the eye of a horned owl. (genus Bubo) bird raptor. Cropped version of Asset ID:
Guess the Animal Eyes Quiz
Can you tell these creatures just by looking at their peepers?


What causes the seasons?
What causes the seasons?
Encyclopædia Britannica, Inc.


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