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Explanation: Sometimes galaxies form groups. For example, our own Milky Way Galaxy is part of the Local Group of Galaxies. Small, compact groups, like Hickson Compact Group 87 (HCG 87) shown above, are interesting partly because they slowly self-destruct. Indeed, the galaxies of HCG 87 are gravitationally stretching each other during their 100-million year orbits around a common center. The pulling creates colliding gas that causes bright bursts of star formation and feeds matter into their active galaxy centers. HCG 87 is composed of a large edge-on spiral galaxy visible near the image center, an elliptical galaxy visible to its...

Is every "now" the same? Does the past, present, and future all equally exist? Am I having a crisis? The Andromeda Paradox - When is "Now"? | 11:09 Kyle Hill | 2.64M subscribers | 1,021,227 views | August 7, 2020 Andromeda Paradox [YouTube search]

Why does energy disappear in General Relativity? 0:00 What is symmetry? 4:25 Emmy Noether and Einstein 7:33 General Covariance 11:59 The Principle of Least Action 15:29 Noether's First Theorem 18:24 The Continuity Equation 23:20 Escape from Germany 24:49 The Standard Model - Higgs and Quarks The Hole In Relativity Einstein Didn't Predict | 27:39 Veritasium | 18.4M subscribers | 8,522,299 views | April 14, 2025 Emmy Noether [YouTube search]

A groundbreaking new biography of Æthelstan marks 1,100 years since his coronation in 925AD, reasserts his right to be called the first king of England, explains why he isn't better known and highlights his many overlooked achievements. The book's author, Professor David Woodman, is campaigning for greater public recognition of Æthelstan's creation of England in 927AD.The Battle of Hastings in 1066 and the signing of Magna Carta in 1215 are two of the most famous years in English history. But very few people know what happened in 925 or 927AD. Professor David Woodman, the University of Cambridge-based author of The...

BBC News reports that more than 100 projectiles were recovered during an investigation of an unstudied area of Scotland's Culloden Battlefield. Fought on April 16, 1746, the Battle of Culloden marked Britain's final defeat of the Jacobite army led by Charles Edward Stuart, who was also known as Bonnie Prince Charlie. Stuart had attempted to place his father, who was the son of the Roman Catholic James II, on the British throne. Yet James II had been deposed in 1688 and his line excluded from English succession under the Act of Settlement of 1701. At the time of the battle,...

According to a Georgia Today report, a chainmail shirt and a helmet dated to the ninth or tenth century a.d. have been unearthed at the site of a medieval palace within Rustavi Fortress. Located in southeastern Georgia, the fortress was constructed in the fourth or fifth century A.D., and destroyed during the invasion of the Mongols in the thirteenth century. The helmet is thought to be the only combat helmet from the period to be discovered in the South Caucasus. To read about another discovery from Georgia, go to "Around the World: Georgia."

The historic Torre dei Conti in Rome, Italy, partially collapsed twice on Monday during renovations, trapping at least one worker in the rubble and critically injuring another. These videos show the moment of the second collapse and its aftermath. Medieval building partially collapses in Rome | 8:53 CBS News | 6.82M subscribers | 46,740 views | November 3, 2025

In doing so, the team has revived an ancient Bulgarian fermentation methodThere was a not-so-secret ingredient in the ice cream sandwiches, creamy cheese and milk-wash cocktails being served at Alchemist, a two Michelin-star restaurant in Copenhagen, Denmark, in recent years: ants. The team's experiments began with an accidental discovery, reports CNN’s Amarachi Orie. They left milk with an ant in it inside their refrigerator, and noticed the milk soon started to curdle. From there, the restaurant, which aims to “transform and transcend the nature of food and dining,” recreated a nearly forgotten ancient Turkish and Bulgarian recipe for making yogurt...

Explanation: A mere 2.5 million light-years away the Andromeda Galaxy, also known as M31, really is just next door as large galaxies go. So close and spanning some 260,000 light-years, it took 11 different image fields from the Galaxy Evolution Explorer (GALEX) satellite's telescope to produce this gorgeous portrait of the spiral galaxy in ultraviolet light. While its spiral arms stand out in visible light images of Andromeda, the arms look more like rings in the GALEX ultraviolet view, a view dominated by the energetic light from hot, young, massive stars. As sites of intense star formation, the rings have...

16:42 VIDEO OF WHAT TO EXPECT IN THE FUTURE OF ROBOTS..... The future is here. I bought an $80k humanoid robot and I'm going to be mistreating it until it turns on me, lets begin... #irobot How this content was made Auto-dubbed Audio tracks for some languages were automatically generated. Learn more GEORGE JETSON NEVER HAD THESE PROBLEMS! Hilarious!.............

Welcome to this weeks video in which we try and claim £10,000 from Mike at the Roman Road Research Association. Do Roman Fords in the UK actually exist? This was a question recently posed with a tongue in cheek reward. We set to find out and claim our prize! £10,000 Says YOU Can't Prove This ROMAN EXPERT Wrong... | 15:01 Paul Whitewick | 209K subscribers | 413,124 views | June 29, 2025 00:00 - The Rewards 01:56 - The Ford 03:16 - The Drawing Board 05:44 - Gargrave 07:22 - Iden Green 10:33 - Barnard Castle 13:39 - £10,000 Please

Live Science reports that analysis of the skeletons of seven men recovered from a well in eastern Croatia in 2011 suggests that they are the remains of Roman soldiers who fought in the Battle of Mursa in A.D. 260. "Presumably, all of the individuals were stripped of any valuables -- weapons, armor, equipment, jewelry, etc. -- before they were thrown into the well," said bioarchaeologist Mario Novak of the Institute for Anthropological Research in Zagreb. He and his colleagues determined that all of the remains represented adult men, four of whom were younger and three who were middle-aged at the...

Excavation of a tomb in central Hungary has yielded an iron saber, silver belt fittings, gilded hair ornaments, earrings made of glass beads, a long knife, and arrowheads, Live Science reports. The fragile weapon was carefully removed from the tomb in a custom-made wooden cradle. Traces of decoration on its curved blade are still visible through a thick layer of rust. The burial, which had been disturbed, was discovered through an examination of satellite imagery as part of “Cemeteries from Space,” a project conducted by researchers from the Hungarian National Museum and the King Saint Stephen Museum. Dated to between...

Roman-era wells that may have been part of the ancient settlement of Maestriana have been unearthed in western Hungary, according to a Daily News Hungary report. The excavation was conducted by a team of researchers from Göcseji Museum ahead of a scheduled construction project. Little remains of the ancient settlement, which was occupied between the first and fourth centuries A.D. "Our most important find consists of three Roman wells from the second century, all located within a single excavation unit," said archaeologist Lívia Simmer. "The internal wooden framework of two wells has survived," she added. Pottery likely imported from Gaul,...

Explanation: What could cause the center of M94 to be so bright? Spiral galaxy M94 has a ring of newly formed stars surrounding its nucleus, giving it not only an unusual appearance but also a strong interior glow. A leading progenitor hypothesis holds that an elongated knot of stars known as a bar rotates in M94 and has generated a burst of star formation in the inner ring. Recent observations have revealed the outer, fainter ring is not closed and relatively complex. M94, pictured here spans about 30,000 light years, lies about 15 million light years away, and can be...

Renegade Science version of the prehistory of our solar system and planet...

Some street snitches are raking in close to $1 million apiece from the city just by recording videos of idling trucks and buses spewing air pollution, prompting local pols to try to curb the staggering payouts. “The days of the six-figure bounty hunters are over,” Queens City Councilman James Gennaro, who chairs the Environmental Committee, told The Post. “We’re not doing that anymore,” he said. “The program has become an occupation. The program was not intended to be an occupation.” The Big Apple’s Citizen Idling Complaint Program was launched in 2019, with the city even recruiting ’80s punk rocker Billy...

Astronomers recently spotted two unprecedented plasma jets blasting out of a supermassive black hole and into space beyond its galaxy. The two extremely powerful plasma jets are the largest ever seen, measuring 23 million light-years from end to end. This distance would cross approximately 140 Milky Ways arranged side by side. Researchers who spotted this unprecedented phenomenon called the pair of plasma jets “Porphyrion” after a giant in Greek mythology. The two jets originate from the top and bottom of the supermassive black hole and have the combined power of trillions of suns. What exactly are black hole jets? Black...

Caedmon's Hymn in Whitby! The 7thC Englishmen who inspired Lord of the Rings | 8:01 BritMapped - Hidden Britain | 22.4K subscribers | 29,517 views | October 29, 2025

Explanation: Often imaged but rarely mentioned, Messier 43 is a large star forming region in its own right. It's just part of the star forming complex of gas and dust that includes the larger, more famous neighboring Messier 42, the Great Orion Nebula. In fact, the Great Orion Nebula itself lies off the lower edge of this scene. The close-up of Messier 43 was made while testing the capabilities of a near-infrared instrument with one of the twin 6.5 meter Magellan telescopes at Las Campanas Observatory in the Chilean Andes. The composite image shifts the otherwise invisible infrared wavelengths to...