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Did You Know? | Kudos365 Curiosity Series

1. Sharks existed before trees.
Shark-like fishes appeared in Earth's oceans more than 400 million years ago. The earliest known trees appeared tens of millions of years later, during the Devonian Period. Sharks therefore belong to an evolutionary lineage considerably older than forests.

2. Some turtles can absorb oxygen through their rear ends.
Certain freshwater turtles can perform cloacal respiration, absorbing dissolved oxygen through specialized tissues near the cloaca. This adaptation is especially useful when turtles remain underwater for extended periods, including during winter dormancy.

3. Earth's atmosphere extends far beyond what we normally think of as “space.”
The atmosphere becomes progressively thinner rather than ending at a sharp boundary. Traces of Earth's outermost atmospheric region extend thousands of miles into space, although satellites and spacecraft operate comfortably within these extremely sparse upper regions.

4. The world's largest waterfall is underwater.
Between Greenland and Iceland, cold, dense water from the Nordic seas plunges beneath warmer Atlantic water in the Denmark Strait cataract. The enormous underwater descent is several times the height of Venezuela's Angel Falls, although it looks nothing like the waterfalls we see on land.

5. Oxford University is older than the Aztec Empire.
Teaching was taking place at Oxford by 1096, although the university did not spring into existence on a single founding date. The Aztec Empire arose much later, in 1428, when the alliance of Tenochtitlan, Texcoco, and Tlacopan established the political power commonly known today as the Aztec Empire.

6. A teaspoon of neutron-star material would have an extraordinary mass on Earth.
Neutron stars compress more mass than the Sun into a sphere only about the size of a city. Matter under those conditions is so dense that a teaspoon-sized amount, if it could somehow be brought intact to Earth, would have a mass of roughly a billion tons. The comparison is illustrative—the material could not simply exist here in the same state.

7. The Canary Islands were not named after canary birds.
The islands' name traces back to the Latin Canariae Insulae, associated with dogs. The familiar yellow canary bird was named after the islands where its wild ancestors were found—not the other way around.

8. The longest-lived vertebrates known to science are Greenland sharks.
Researchers studying Greenland sharks have estimated that exceptionally old individuals can live for several centuries, with one large female estimated at roughly 400 years old, though with a substantial range of uncertainty. That means some Greenland sharks alive today may have been born centuries before the United States existed.

Sometimes the familiar world becomes much more interesting when we look a little closer --  Explore. Discover. Learn.

Curiosity Series © 2026–Present Kudos365. All Rights Reserved. | M1.0.2 | HSR2.3.0

History Series CONTRIBUTOR

Pablo Neruda || Featured Biography

Posted by Kronos • Profile • 10/14/26 at 01:00AM • Biographies • History • See more by Kronos

PABLO NERUDA (1904 - 1973) | Kudos365 History Series

Poet, Diplomat, and Voice of Latin America

Pablo Neruda was a Chilean poet, diplomat, and political figure whose writing ranged from intimate love poetry to sweeping accounts of history, nature, labor, and the peoples of Latin America. Awarded the Nobel Prize in Literature in 1971, he became one of the most widely read poets of the twentieth century. His extraordinary literary achievement coexisted with intense political commitments and troubling aspects of his personal conduct, making his legacy both influential and contested.

He was born Ricardo Eliécer Neftalí Reyes Basoalto on July 12, 1904, in Parral, Chile. His father, José del Carmen Reyes Morales, worked for the railway, while his mother, Rosa Basoalto, was a schoolteacher. She died from tuberculosis shortly after his birth.
Neruda’s father moved the family to Temuco, a frontier town in southern Chile, and married Trinidad Candia Marverde. Neruda remembered his stepmother with affection. The forests, rivers, rain, and rugged landscapes of southern Chile left a permanent mark on his imagination and later appeared throughout his poetry.

Photography Series CONTRIBUTOR
NASA Series CONTRIBUTOR

NASA Astronomy Picture of the Day:

This stairway in Chile brings you only a little bit closer to heaven. But ooh, the sky above it makes you wonder. For example, you may wonder about the dark lane of our own Milky Way galaxy rising behind the expansive Atacama Desert in Chile, the band of zodiacal light on the upper left, the green and red airglow just above the horizon, the star Spica in the zodiacal light stripe, and, at the very top on the right, the Small Magellanic Cloud galaxy. The Desert Staircase sculpture is in the foreground, and this image was timed to catch the picturesque peering perch just in front of the near-vertical Milky Way band. Upon close inspection of the horizon you can find, left to right, some Andes Mountains, the Licancabur volcano, and the town lights of San Pedro de Atacama. The featured wide-angle composite was captured in July 2025.

Photo by Julien Looten

History Series CONTRIBUTOR

THE LIFESPANS OF OUR ANSESTORS | The Past That Shaped Us

 Why the short lifespans of the past don't mean quite what they seem to mean

We often hear that people in ancient or medieval times lived only 25 or 30 years. It is an easy number to misunderstand. It can leave us imagining that a 30-year-old Roman or medieval farmer was already approaching the end of a normal life.

That isn't what the number means. Human beings have been capable of living into their 60s, 70s, and occasionally beyond for a very long time. What was dramatically different in the past was how many people survived long enough to reach those ages.

Understanding that difference changes the story of human longevity.

What Does a Life Expectancy of 30 Really Mean? Life expectancy at birth is an average. It estimates how long a newborn could expect to live under the mortality conditions of that particular population and time. For most of human history, one factor had an enormous effect on that average: many babies and young children died.

Imagine a community in which several children die before reaching age five, while many of those who survive childhood eventually live to 50, 60, or even 70. Average all of those lifespans together and the result can still be surprisingly low. That is essentially what happened throughout much of human history.

Disease, infection, poor sanitation, food shortages, accidents and complications of childbirth all contributed to early death. Without vaccines, antibiotics and modern medical care, illnesses that are routinely treated today could be fatal. The result was a world in which death was particularly common during the first years of life. So when we encounter an estimated historical life expectancy of 25 or 30 years, we should not picture a society in which most adults died at 30. We should picture a society in which many people never became adults at all.

People Still Grew Old

Older people were hardly unknown in the ancient world. Historical records, inscriptions, burial evidence and written accounts make it clear that some people lived into their 60s, 70s and beyond. The important difference was probability.

A child born today in a prosperous modern society has an excellent chance of surviving childhood. For most of history, that could not be taken for granted. Someone who successfully passed through infancy and childhood had already survived one of life's most dangerous periods.This creates an important distinction between two questions.

 One asks how long human beings were capable of living. The other asks how long the average newborn could expect to live. Those are very different things. The biological possibility of old age is ancient. The widespread expectation of reaching old age is comparatively new.

For Thousands of Years, Little Changed

Exact worldwide figures become increasingly uncertain the farther back we go. There were no national statistical agencies recording every birth and death in ancient Egypt, Rome, medieval Europe, or prehistoric communities. Nevertheless, demographic research suggests that life expectancy at birth remained remarkably low for most of human existence, commonly somewhere in the broad range of roughly 20 to 35 years.

Even as civilizations rose and fell, cities expanded, trade crossed continents and knowledge accumulated, mortality remained stubbornly high.Around 1800, estimated global life expectancy at birth was still only about 29 years.
Then the pattern began to change. The improvement was slow at first and unevenly distributed. By 1900, global life expectancy was still only about 32 years. But during the twentieth century the numbers began rising at a pace humanity had never previously experienced.

By 1950, worldwide life expectancy had reached roughly 46 years. By 1970 it was about 56 years, and around 2000 it had reached approximately 67 years. Today the global figure is above 70 years. In little more than two centuries, humanity had accomplished something that thousands of years of earlier civilization had not. - What Made the Difference?

There was no single discovery that suddenly extended human life. Instead, many improvements accumulated and reinforced one another. Clean drinking water and sewer systems reduced exposure to infectious disease. Better nutrition strengthened people's ability to survive illness. Vaccination prevented diseases that had once killed enormous numbers of children and adults. Antibiotics eventually turned many bacterial infections from potential death sentences into treatable conditions.

Childbirth became safer. Food supplies became more reliable in many parts of the world. Public-health authorities learned how diseases spread and how outbreaks could be contained. Medical knowledge, hospitals and emergency care steadily improved.
Some of the greatest gains came not from treating people after they became sick but from preventing them from becoming sick in the first place. And underlying much of the dramatic rise in average life expectancy was a profound change: more children survived.

When infant and childhood deaths declined, life expectancy at birth rose sharply. Later advances increasingly helped people survive the diseases and conditions of middle and old age as well.

From Surviving Childhood to Expecting Old Age

This helps explain why comparing a life expectancy of 30 in the distant past with one above 70 today can be misleading.The difference is not simply that modern people receive an additional 40 years of biological life. The earlier average included enormous numbers of lives cut short almost as soon as they began. Those who survived the dangerous early years often lived for decades afterward.

Modern societies changed that equation.

Infancy became much safer. Childhood became much safer. Pregnancy and childbirth became safer. Infections became more survivable. Then improvements in medicine began extending life at older ages as well. Gradually, something historically remarkable happened. Growing old stopped being an experience reserved for a relatively fortunate portion of the population and became an ordinary expectation for millions—and eventually billions—of people.

Lasting Impact

Longer lives have transformed society in ways that reach far beyond medicine. Families can now routinely include three, four, and sometimes five living generations. Grandparents may participate in their grandchildren's lives for decades. Education can extend further into adulthood. Careers may span 40 or 50 years, followed by retirement periods that themselves can last decades.

The change has also created new challenges. Societies must provide pensions, healthcare and social support for large older populations—circumstances that would have been unimaginable when relatively few people survived into advanced age. Perhaps most importantly, longer lives have changed our expectations. We make plans for decades ahead because most of us expect those decades to exist. That expectation is historically extraordinary.

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Photography Series CONTRIBUTOR
Word of The Day CONTRIBUTOR
Photography Series CONTRIBUTOR
Quotable Series

James A. Michener - (February 3, 1907 - October 16, 1997) American writer who wrote more than 40 books. The majority of his books depicted generational family sagas. The list of Michener's books includes Hawaii, Return to Paradise and his first book, Tales of the South Pacific for which he won the 1948 Pulitzer Prize.