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What is relativity? Einstein's mind-bending theory explained

When the theory of relativity appeared in the early 1900s, it upended centuries of science and gave physicists a new understanding of space and time. Isaac Newton saw space and time as fixed, but in the new picture provided by special relativity and general relativity they were fluid and …

Physics

New study has a theory for why we haven’t found aliens yet, and it makes a whole lot of sense

Mankind has been gazing into space for some time now, but scientists still haven’t found any evidence that intelligent life exists in our neck of the …

Massive new line drawings revealed in Peru

Using drone cameras, scientists have documented spectacular line drawings newly discovered in southern Peru. They are likely much older than the …

How Come Cosmic Inflation Doesn't Break The Speed Of Light?

When you think about where the Universe came from, you likely think about the hot Big Bang as our origins. According to the Big Bang, we began with an early, dense, uniform state of high-energy matter and radiation, which then expanded, cooled and clumped together to become the Universe we inhabit …

Universe

Are aliens real? Grim discovery raises doubts about existence of extraterrestrial life

The universe could be a more lonely place than we ever imagined.<p>A new study has cast doubt on the existence of alien life after discovering that a …

This Video About The Scale of Black Holes Will Crush Your Poor, Tiny Brain

We were not prepared for this.<p>Black holes are vast, matter-annihilating objects that seem to defy physics by their very existence. They're so weird, …

Invisibilia: We All Think We Know The People We Love. We're All Deluded

<i>Welcome to a new season of</i> Invisibilia<i>! The NPR program and</i> podcast <i>explores the invisible forces that shape human behavior. Episode 3 involves two brothers who are happy about the polite, helpful tenant who moves into their mother's house, until they start to suspect he has sinister motives. Here</i> …

Psychology

How Winston Churchill stole from India for Britain’s war

“I am glad to learn from the Minister of War Transport that a strict line is being taken in dealing with requests for cereals from the Indian Ocean area. A concession to one country at once encourages demands from all the others,” the prime minister commented in a memo on 10 March 1943. “They must …

See Seven Ancient Ruins As They Would Have Looked In Their Prime

From the unmatched wonder of Cambodia’s Angkor Wat to the sprawling majesty of the temples of Bagan in Myanmar (aka Burma). From Egypt’s Great Sphinx of Giza to the extraordinary carved city of Petra in Jordan. These remnants of the ancient world have long cast a spell over travelers from every …

Ancient History

Pictures of the Week 3.22.18

Genetic tests reveal tragic reality of Atacama 'alien' skeleton

When the mummified remains of a six-inch humanoid were found in an abandoned mining town in Chile’s Atacama desert 15 years ago, speculation on its origins ran wild. The skeleton, which was sold to a private collector in Spain, was so bizarre it appeared in a documentary as potential evidence for …

Anthropology

The Harvard Professor & the UFOs

One of the best and the brightest, a Pulitzer Prize-winning psychiatrist,has made himself into a high priest of what is politely called the …

21 Facts That Will Remind You How Complex The Universe Really Is

"The universe is full of magical things patiently waiting for our wits to grow sharper."

These 4 Cosmic Phenomena Travel Faster Than The Speed of Light

Breaking the light barrier.<p>When Albert Einstein first predicted that light travels the same speed everywhere in our Universe, he essentially stamped …

Physics

An increasing number of scientists are waking up to the idea of a link between the digestive system and problems with sleep<p>When we lie awake at night, unable to sleep, we usually blame stress, depression, anxiety, adrenaline or the memory of something stupid we said in 2003. But what if our guts …

Sleep

Where did the antimatter go?

<b>(CNN) —</b> You've no doubt heard of Einstein's famous equation E = mc2, and you may well have heard that it means that matter can be converted to energy and back again. That statement is true but incomplete.<p>What is more correct is that energy can be converted not only into matter, but also antimatter …

Terrifying unexplained mysteries of deep space

Space is big and dark, and since there is no air, no one can hear you scream as you float away forever and ever and ever. But those are only the …

In a thought-provoking new paper, three Yale scientists argue it’s not inequality in life that really bothers us, but unfairness<p>Anyone looking for evidence that people have a natural aversion to inequality will find numerous laboratory studies that seemingly confirm their view. Studies have found …

Income Inequality

This Is How the Number 3.14 Got the Name 'Pi'

It’s not hard to figure out why March 14 is celebrated annually as “Pi Day” by math fans: The date resembles the ratio of a circle’s circumference to …

How Big Was The Universe At The Moment Of Its Creation?

You might think of the Universe as infinite, and quite honestly, it might truly be infinite, but we don’t think we’ll ever know for sure. Thanks to the Big Bang — the fact that the Universe had a birthday, or that we can only go back a finite amount of time — and the fact that the speed of light is …

Dark Matter

Want to move abroad? Try here

We talked to residents in the top-ranking countries for expats to find out what exactly makes their adopted country so special.<p>As the world becomes more connected, the number of people living outside their home country is on the rise – more than 244 million globally, estimates the United Nations, …

Travel

Earth's Skies Are Violet, We Just See Them As Blue

Why is the sky blue? It’s a common question asked by children, and the simple answer is that blue light is scattered by our atmosphere more than red light, hence the blue sky. That’s basically true, but then why don’t we see a violet sky?<p>The blue sky we observe depends upon two factors: how …

Astronomy

How an emotional 'hangover' changes your brain - Futurity

The "emotional hangover" is a real phenomenon, according to research showing that emotional experiences have lingering effects on our brains.

These 5 mind-melting thought experiments helped Albert Einstein come up with his most revolutionary scientific ideas

One of Einstein's most defining qualities was his remarkable ability to conceptualize complex scientific ideas by imagining real-life scenarios. He called these scenarios Gedankenexperiments, which is German for thought experiments.<p>Here are a few thought experiments that demonstrate some of …

Could you pass Astronomy 101? Take the quiz!

<b>Subscription Information</b><p><b>Free Newsletters</b><p>By Liz Fuller-Wright, Correspondent August 28, 2013<p>1. What's the brightest star in the night sky?<p>(Read …

Why We Are Secretly Attracted To People Who Look Like Our Parents

Have you ever thought there was an uncanny family resemblance between your friend and her partner? Or wondered for a fleeting moment whether the pair …

Psychology

Ask Ethan: Are there different types of space and time?

If everything is relative, as Einstein says, then how do cosmologists measure these quantities in ways everyone can agree?<p><i>“A human being is part of a</i> …

3tags.org

How to Become an Expert at Anything, According to Experts

Being an expert at something really pays off. Just how good are top performers compared to everybody else?<p>Research shows in high complexity jobs like …

How did the Universe get its first supermassive black holes?

How they get so big so fast is a mystery. Could “direct collapse” be the solution we’re seeking?<p><i>“For something to collapse, not all systems have to</i> …

Black Holes