New find shows animal life may have existed millions of years before previously thought

Simple animal life may have existed in Earth’s oceans 890 million years ago, according to new research.

Recently discovered fossils belonging to ancient sponges might be the earliest known remnants of an animal body and pre-date other sponge fossils by 350 million years.

Elizabeth Turner, a professor of paleontology and sedimentary geology at Laurentian University in Ontario, discovered what she believes are possibly the fossilized structures of sponges that once existed in reefs millions of years ago. They were found in rock samples in northwestern Canada.

A study on Turner’s findings published Wednesday in the journal Nature.

Little is known about the earliest days of animal life’s emergence on Earth because the fossil record is sparse. While scientists have used genetic evidence to suggest that sponges first appeared between 541 million and 1,000 million years ago during the early Neoproterozoic era, the lack of fossilized sponges has created a knowledge gap. Turner’s discovery may help fill that gap and provide a glimpse into the earliest marine animal life on Earth.

“I serendipitously came across a few very rare examples of the material during my unrelated PhD research, long ago, on fossil microbial reefs,” Turner said. “When I became a professor and had my own grants, I was able to return to the field sites and collect more material so that I had a more robust collection to work from.”

What she found in the ancient rock samples were fossilized structures that resembled the skeletons like those that exist within horny sponges – the kind you use for a bath sponge. Horny sponges, also called modern keratose demosponges, have a skeleton with three dimensional branching made of a tough organic substance called spongin.

The branched networks of tube-shaped structures were covered by mineral calcite crystal. These also appeared similar to structures found in calcium carbonate rocks that were likely created when horny sponge bodies decayed.

“This organic skeleton is very characteristic and there are not known comparable structures,” said Joachim Reitner, a professor in the University of Goettingen’s department of geobiology who reviewed Turner’s study ahead of publication.

Life as an ancient sponge

The ancient sponges lived in “shadowy nooks and crannies” on and below large reefs made from water-dwelling bacteria that were photosynthesising, or converting light energy into chemical energy.

“They may well have hunkered down and lived a sweet life without having to evolve much for a few hundred million years,” Turner said.

The “oxygen oasis” and potential food sources produced by the bacteria would have been a Goldilocks spot for the sponges.

These sponges appeared 90 million years before events thought necessary to support the appearance and diversification of animal life.

About 800 million years ago, Earth’s oxygen levels increased during what scientists refer to as the Neoproterozoic oxygenation event, when there was a substantial boost in the amount of oxygen in the oceans and atmosphere.

The sponges may have been tolerant of low oxygen levels, so what was provided by the bacteria could have been enough.

Then, there were also the Cryogenian glacial episodes, during which much of Earth likely experienced severe ice ages between 635 million and 720 million years ago. The sponges weren’t likely affected by this either.

The finding in Turner’s paper “is a milestone in the understanding” of the animal family tree and reveals that the origin of it was much earlier than previously thought, Reitner said.

The animal life timeline

Many fossils can be dated back to the Cambrian explosion, a period 540 million years ago when diverse animal life flourished on the planet, according to David Bottjer, professor of Earth sciences, biological sciences and environmental studies at the University of Southern California. Bottjer was not involved in this study.

“The fossil record of animal life is something that many people are interested in and in particular, when animals first evolved on Earth,” he said. “The big discussion has been, was there animal life in a significant way in the pre-Cambrian before the Cambrian explosion or not.”

Researchers use two data sources to address these, he said. One is the fossil record. Then, there are molecular clocks, which are used to help scientists estimate how evolution has occurred in different organisms over time. The idea is that DNA evolves at a constant rate within organisms and genetic evidence can fill the gaps where the fossil record is sparse or entirely bare.

“This molecular clock approach says that animals were on Earth a good deal earlier than the Cambrian,” Bottjer said.

Previously, many scientists believed spicules – the mineralized skeletal structure of sponges – were needed to show the existence of sponges. But some sponges don’t have mineralized skeletons.

If complexly structured and diverse fossils are appearing in the rock record during and before the Cambrian period, it suggests that animals had to evolve ahead of that, Turner said.

This also suggests a time when animals existed, but were not well preserved or preserved at all – prior to skeletons, shells and exoskeletons, Turner said. She understands that the earlier timeline suggested by her research “may be a little alarming for some researchers.”

Bottjer thinks Turner has authored “a very well-founded paper.” He also acknowledges that her findings will certainly ignite discussion among researchers.

“I tell my students that all pre-Cambrian fossils are disputed by somebody because it’s very early in evolution,” Bottjer said. “These animals commonly don’t have all the features that they evolve later on so it can be a little tricky. I look forward to seeing what the response is, but it’s I think it’s a very strong case.”

What isn’t surprising is that the earliest evolutionary animals were probably sponge-like, Turner said. Sponges are simple, basic animals with a long history in the fossil record, and prior research suggests they likely appeared around this time.

Investigating the distant past

Now, Turner wants to investigate when sponges actually emerged if they were already present 890 million years ago.

“The early evolution of animals remains murky, regardless of what I have to offer in this paper,” she said. “What is needed is a lot of really focused work on very thoughtfully chosen rocks of the same age, as well as younger and older rocks, to look for other possible physical evidence of early animals – sponge-like and possibly other more complex types of animals.”

She also suggests keeping an open mind during the search. When it comes to early animal life, researchers really have no idea what they will find.

Turner also said the current academic standard and research grant system is less supportive of the type of time-consuming work, often resulting in unpublishable findings, that will be required to thoroughly understand and investigate the rock record of early animal evolution.

“If we find ourselves looking for something that looks familiarly animal-ish, we will fail, because the familiar is too complex for the earliest animals,” she said. “We need to do some real soul-searching about what early animal preservation might have been like.”

This research could even help in the search for life beyond our planet. While the Perseverance rover searches for evidence of ancient microbial life on Mars in an ancient lake bed, the ancient rock record on Earth could help scientists spot intriguing targets.

“If we’re going to find things on other planets, it’s probably going to be more like the pre-Cambrian stuff than something that is a million years old and has mammoth bones in it,” Bottjer said.

Source: https://edition.cnn.com/2021/07/28/world/e...

This is the Trophy of the battle of Marathon

It is dated to 470-460 BC.

In September 490 BC, on the plain of Marathon, 10,000 Athenians and 1,000 of their allies from the Boeotian city-state of Plataea, under the command of General Miltiades, fought and defeated the army of the powerful Persian Empire. The battle led to the ignominious end of the first Persian attempt to subjugate Greece under the rule of Darius I.

On the column was probably placed the statue of Victory, in bigger size than natural and with lively movement.

According to ancient custom, the Athenians erected a wooden trophy on the battlefield, from which they hung the Persians' spoils of arms.

A few years later it was replaced by a monumental trophy made of white marble to commemorate the great victory over the Persians. On the column was probably placed the statue of Victory, in bigger size than natural and with lively movement.

Part of the Trophy is now exhibited in the Archaeological Museum of Marathon, while a copy of it is placed near its original location in Panagia Mesosporitissa.

The Trophy was restored in 2004, preserving parts of the column and the capital. In 2016, the capital was completed by Professor Manolis Korre with two parts of the suffix.

You could visit the permanent exhibition of the Archaeological Museum of Marathon, where the history of the region from prehistoric to Roman times is presented through finds from the prehistoric cemeteries of Vrana and Tsepi, the burial mounds of the Athenians and Plataeans who fought against the Persians in the Battle of Marathon (490 BC).

Archeologist Discover What's Inside the Temple of The Forgotten Pharoah Djeser Djeseru

Today we'll be exploring the lost temple of The Temple of Forgotten Pharaoh Djeser-Djeseru!

The Temple of Hatshepsut, also known as the Djeser-Djeseru, is an ancient temple complex located in the Deir el-Bahri complex near Thebes (Luxor). It was built for the female pharaoh Hatshepsut, who ruled Egypt during the 18th dynasty in the 15th century BCE. She is notably known as the Forgotten Female Pharaoh who fell victim to Damnatio Memoriae. The temple is known for its striking architecture and intricate reliefs and carvings, and it offers a glimpse into the life and reign of one of ancient Egypt's most powerful and enigmatic rulers.

What recently happened to Lake Mead has shocked scientists

Lake Mead - one of the largest man-made reservoirs in the US and the lifeline for millions of people is unveiling some mysteries. Scientists have recently discovered a shocking fact about this lake, which alarms us. What is it and why should you be worried?

Today we will discuss the recent happening with Lake Mead and its shocking discoveries.

Why Do Some Countries Use Different Calendars?

In this video we will talk about the different calendars that exist throughout the world. We will explain how, in general, calendars are categorized as either being Solar, Lunar, or Lunisolar; with the first being related to the position of the sun, the second related to the position of the moon, and the third related to both.

We list some of the more well known calendars in each of these categories - such as the Chinese calendar, the Hebrew, the Islamic, or the Indian National Calendar - explaining in which circumstances they are used and understanding how most of the world, save a few exceptions, has adopted the Gregorian Calendar as its main civil calendar, using local ones for cultural and religious purposes only.

What were Ronin?

Ronin (Masterless Samurai) have become a very iconic image of old Japan, yet much of their identity has been romanticized over the years. In this video we dive in and discuss the fascinating truth about what Ronin really were.

Medieval Origins of Ukrainians

In this video we will be investigating the medieval origins of Ukrainians, as we explore how the identity of Ukraine as a nation formed starting with the Kyivan Rus and the kingdom of Ruthenia. We will also talk about the Mongol period.

What Life Was Like for the Mayas

You may have scrolled past one of their haunting, crumbling pyramids in the background of your well-traveled friend's Instagram posts. But chances are, you have no idea what everyday life was really like for the ancient Mayans. From ballgames to body piercings to getting hopped up on chocolate, the ancient Mayan culture has a lot more in common with our world today than you'd probably ever think. Today, we're exploring what life was really like for the ancient Mayans.

What Was Aztec Hygiene Like

The Aztec, a collective of Mesoamericans who thrived from the 14th to the 16th centuries, were the inheritors of ancient cultural traditions from their Olmec, Mayan, and Toltec predecessors. Aztec hygiene practices reflected earlier practice, continuing a dedication to cleanliness and purity.

When Spanish conquerors first encountered the Aztec peoples during the early 16th century, they were amazed by their techniques for keeping themselves and their surroundings clean. A stark contrast to European practices at the time, the Aztec empire went to great lengths to provide clean water to the masses, rid the air of perceived pollutants, and use natural ingredients to promote health and hygiene.

Remains of ‘Big John’, the largest known triceratops, fetch nearly €6.6m

At a Paris auction on 2021, a private, anonymous American collector paid 6.65 million euros ($7.74 million) for the fossilized remains of ‘Big John’. Big John is the largest triceratops dinosaur the paleontologists ever unearthed.

Big John roamed modern-day South Dakota more than 66 million years ago. It got the name after the owner of the land where they discovered the dinosaur’s bones.

“It’s being acquired by an American collector, and that individual is absolutely thrilled with the idea of being able to bring a piece like this to his personal use,” said Djuan Rivers, a representative for the buyer.

They found the first bone from the colossal skeleton, the head alone is 2.62 meters in length and two meters in width

Paleontologists found 60% of the skeleton by 2015. It is a rare feat since the skeleton consists of over 200 fragments. They meticulously put the whole skeleton together piece by piece in Italy to prepare for the Paris auction.

Big John the triceratops

There was a traumatic lesion on the skull. Researchers believe that its cause is that another triceratops hit it from behind.

“The history behind this and the duration of it is absolutely impressive. So to be able to be a part of preserving something of this nature that was actually found in the U.S., in South Dakota, is also something extremely special,” Rivers said.

Then, the name Triceratops means “three-horned face”.

Before commission and other charges, the hammer price at the Drouot auction house was 5.5 million euros. The skeleton was likely to sell between 1.2 and 1.5 million euros, according to Drouot. An unnamed private American bidder bought it.

“It’s a record for Europe,” said auctioneer Alexandre Giquello. He described exponential growth in the relatively new market of dinosaur fossils. “We’re creating a market.”

On 2020, Christie’s auction house in New York sold a Tyrannosaurus rex skeleton for $31.8 million.

Source: https://www.breezyscroll.com/animals/remai...

Ancient mirror and iron sword found in the 4th century Nara burial mound in Japan

Researchers have unearthed a shield-shaped bronze mirror and massive iron sword in an ancient kofun burial mound here, unprecedented discoveries of their kind in Japan.

The unusually shaped mirror and sword of more than 2 meters were discovered at the Tomiomaruyama kofun, Japan’s largest round kofun, which was created in the second half of the fourth century.

The Nara Municipal Buried Cultural Properties Research Center, which excavates and researches kofun, and the Nara prefectural Archaeological Institute of Kashihara, which assists in the excavation, announced the discoveries on Jan. 25.

The Nara center started excavating the Tomiomaruyama kofun in fiscal 2018.

During the current fiscal year, experts excavated a part of the kofun called "tsukuridashi," which is a projected part in the middle portion of the burial mound, and found a burial facility housing a 5-meter-long wooden coffin.

The experts discovered an iron sword and a bronze mirror in the clay that covered the coffin.

Archaeologists have uncovered a massive burial mound in Siberia, revealing a skeleton buried with gold

A Polish-Russian team unearthed the woman's remains accompanied by a gold pectoral ornament along with a bronze mirror inside a large mound that they believe is 2,500 years old. The ancient tomb also held the remains of five people buried with a treasure trove of grave goods, such as a crescent moon-shaped pendant, bronze mirror and gold earrings. The study was conducted at the archaeological site Chinge-Tey is located in the Touran-Uyuk valley in northern Tuva, a republic in the Asian part of Russia.

The site is called the 'Siberian Valley of the Kings' because of the many large mounds filled with treasures.

The Scythians, an umbrella term for nomadic groups that lived on the steppes between the Black Sea and China from about 800 B.C. to about A.D. 300, created the burial mounds.

On 2021, Polish archaeologists from the Jagiellonian University in Kraków discovered two graves at the site after detecting them through “aerial laser scanning” technology.

The first of these was in the central part of a destroyed, almost completely flattened mound with a diameter of approximately 25 metres.

The mounds were actually built as a wooden burial chamber with solid beams supporting the structure.

Inside the mound, the researchers found two bodies, one of a woman who died at the age of about 50, and the other of a toddler, aged about 2-3 years old.

Archaeologists also discovered gold ornaments, an iron knife and a very well preserved decorated wooden comb.

Dr Łukasz Oleszczak from the Jagiellonian University in Kraków told Science in Poland: “A particularly interesting artefact was a golden pectoral ornament, a decoration hung at the neck in the shape of a sickle or crescent.

Dr Oleszczak stressed that such objects, generally found in mounds from southern Siberia, were almost exclusively discovered in the graves of men.

He added: “They were considered symbols of belonging to a social group, caste, perhaps warriors - in any case, men.

“Its presence in the grave of a woman is a very interesting deviation from this custom.

“This certainly confirms the unique role of the deceased in the community of the Valley of the Kings.”

He also highlighted that the woman was buried in the central part of the tomb, which was located very close to great mound that researchers believed belonged to a nomad prince.

He said: “It seems that, like the others buried in this barrow, she belonged to the prince's entourage”.

According to the researchers, the graves come from the 6th century BCE, when the peoples of Scythian origin lived in these areas.

Source: https://www.express.co.uk/news/science/158...