According to the accurate measurement of the solar year, the ancient Egyptians used their superb wisdom to develop a very accurate calendar. In this calendar, there are 365 days in a year, which is only about 1/4 days less than the current international Gregorian calendar. It can be said that the accuracy is extremely high. The ancient Egyptians had only three seasons in a year, and each season had four months, so there were still twelve months in a year, thirty days in each month, and five days in surplus at the end of the year. In addition, they divide each month into three weeks, ten days a week.
Because the year defined in the ancient Egyptian calendar is nearly 1/4 days shorter than the solar year, astrologers will find some stellar events wandering in the calendar, so this calendar is called "Vagus Year" (meaning "Wandering Year").
(Source: pinterest.com)
But when we look up at the sky, why can only a hot star like the sun attract our attention?
When the night covers our blue planet, we look up at the starry sky and see a night full of trillions of stars, and the faint starlight emitted by these stars is trillions of clocks hanging at night, because of their twists and turns, recording the passage of billions or even billions of years. Even on the earth, we humans are not the only creatures affected by this, and creating another miracle of the intersection of time and life may be in some inconspicuous corners.
(Source: FatCatArt)
Costa Rica is located in Central America, bordering Nicaragua in the north and Panama in the south. The name of this country means "rich coast" in Spanish. Thus, the richness of the country's natural ecological environment can be seen.
In this country, coffee beans produced in high latitudes are famous all over the world. All coffee blenders are intoxicated by their rich aroma and mild taste (sour fruit), and I am no exception.
(Photo taken by Daniel Rusvik on Unsplash)
But the high-end products that can be found in this country are not just coffee beans. Its west coast hides an amazing secret.
The west coast of Costa Rica faces the North Pacific Ocean, which is one of the few places on earth where a large number of sea turtles collectively lay eggs. When the sun goes down, with the tide of the ocean, a large number of turtles meet and come to this coastline, leaving new life here. All this has been staged year after year on earth, with a history of more than 100 million years.
At that time, the earth was far from our human history, and the Jurassic era dominated by dinosaurs continued, and even the earth plate was not what it used to be. However, under such great changes, these turtles still find here accurately year after year and continue to multiply their lives. This may be the oldest life cycle on earth.
(Anna Wangler's photo on Unsplash)
The arrow of time tells more stories about time than we humans or any life on earth can record. Our earth, as a planet of the sun, is thought to have originated from a nebula 4.6 billion years ago. Nothing is older than creating the whole universe. We have reason to believe that it came from a big bang about 654.38+0.38 billion years ago. Past events related to the universe cannot be spent in one or two cups of coffee or one afternoon. Twitter of The Big Bang Theory is a good book that makes people sleepy.
But here, I want to say: time is not an ordinary thing, it is not like a book in your hand, you can turn to that page at any time; Unlike vinyl records, you can rewind them at will. Time, once passed, can never be found back. Just like the life of each of us, from the beginning when one of hundreds of millions of sperm successfully landed in an egg cell, we began the journey of a new life, until finally it decayed into bone and returned to dust. We have no chance to turn back, because time is one-way.
(Image from Prince of Persia: Blade of Time)
In our universe, all events occur in chronological order, and we have never seen an event that violates the arrow of time within the physical category we can recognize. What is hidden behind this is a solid physical law: our world always starts from an orderly state, but always evolves into a disorderly state. In thermodynamics, this is the law of entropy increase. It defines the arrow of time. Through it, we realize that the life cycle of human beings and many creatures is only a moment on the earth, and the earth is only a small part of the dust in the galaxy. Even such a bright and magnificent galaxy is just the most common corner in the evolution of the universe. Where the future of our universe will go is still an unknown scientific mystery.
Journey Stars still have a lot of luck in the lonely and unfortunate time journey. For example, while human beings are living endlessly on the blue planet, there are so many animals, plants and microorganisms interdependent; As one of the nine planets in the solar system, the earth is accompanied by the only satellite moon. Looking deeper into space, are we really so lonely, or will we meet other intelligent life in a corner of this vast starry sky? In the space strategy simulation game Stellaris, a group of happy fat houses have begun the dream of interstellar colonization.
With the support of sufficiently developed science and technology, what preparations should we make if we really leave the planet under our feet and start an interstellar journey? Perhaps at that time, we will hope to spread the various features of the currently developed civilization to a wider interstellar space, such as religious thoughts, cultural traditions, political ecology, legal rules, science and technology, and so on. For me, what I hope to carry and spread most is the social emotion of mutual concern evolved from human society and other biological groups, that is, love.