Witness the Glory of the 2024 European Tree of the Year – Growing in Poland for 200 Years

credit – Marcin Kopij

In this year’s edition of the European Tree of the Year contest, the leafy crown was bestowed upon a common beech in the botanical gardens of the University of Wroclaw.

Thought to be 200 years old, The Heart of the Garden is the third Polish tree in a row to win, following up on the Oak Fabrykant with its outrageous 60-foot-long digit in 2023, and the 400-year-old Oak Dunin outside the Białowieża Primeval Forest, in 2022.

“Its majestic appearance impresses us with its unusually shaped and thick trunk, widely spread branches, and purple-colored leaves that shine beautifully in the sun,” the contest organizers wrote.

Known in the UK as a “copper beech” all beech trees seem to have the genetic potential to be purple, though exactly what causes it to happen is unknown. The naturally occurring mutation appears spontaneously, without human interference, and is most commonly seen in either saplings or old trees.

The Heart of the Garden is certainly old, and what a wonderful confluence of character that it should have been grown as the centerpiece in the arboretum, and be 200 years old, and have a copper beech mutation.

The Fagus genus took silver as well, with The Weeping Beech of Bayeux, in France. Popular for its immense weeping canopy and massive twisted branches probably related to whatever genetic mutation is responsible for Verzy’s faux trees, it’s a perfect romantic spot for celebrations and weddings.

Spreading over 120 feet, or 40 meters in width today, the city had to keep on perfecting an incredible supporting structure for the last 100 years.

Held every year, the European Tree of the Year contest is a delightful opportunity for tree photographers to showcase their skills, for nature lovers to connect with the continent’s wild heritage, and for residents to celebrate the old or interesting trees in their area.

Ongoing since 2011, it grew from a similar contest held in Czechia, and as a result, East-Central Europe boasts the largest number of finalists.(CORRECTION: An earlier version described the 200 year old tree as 2,000 years old.) Witness the Glory of the 2024 European Tree of the Year – Growing in Poland for 200 Years

Read More........→April 01, 2024

Earthquake footage shows Turkey’s buildings collapsing like pancakes. An expert explains why

 

Mustafa Karali / AP Mark Quigley, The University of Melbourne

A pair of huge earthquakes have struck in Turkey, leaving more than 3,000 people dead and unknown numbers injured or displaced.

The first quake, near Gaziantep close to the Syrian border, measured 7.8 in magnitude and was felt as far away as the UK. The second occurred nine hours later, on what appears to be an intersecting fault, registering a magnitude of 7.5.

Adding to the devastation, some 3,450 buildings have collapsed, according to the Turkish government. Many of the modern buildings have failed in a “pancake mode” of structural collapse.

Why did this happen? Was it simply the enormous magnitude and violence of the quake, or is the problem with the buildings?

Thousands of years of earthquakes

Earthquakes are common in Turkey, which sits in a very seismically active region where three tectonic plates constantly grind against one another beneath Earth’s surface. Historical records of earthquakes in the region go back at least 2,000 years, to a quake in 17 CE that levelled a dozen towns.

The East Anatolian Fault zone that hosted these earthquakes is at the boundary between the Arabian and Anatolian tectonic plates, which move past each other at approximately 6 to 10 mm per year. The elastic strain that accumulates in this plate boundary zone is released by intermittent earthquakes, which have occurred for millions of years. The recent earthquakes are thus not a surprise.

Despite this well-known seismic hazard, the region contains a lot of vulnerable infrastructure.

Over the past 2,000 years we have learnt a lot about how to construct buildings that can withstand the shaking from even severe earthquakes. However, in reality, there are many factors that influence building construction practices in this region and others worldwide.

Poor construction is a known problem

Many of the collapsed buildings appear to have been built from concrete without adequate seismic reinforcement. Seismic building codes in this region suggest these buildings should be able to sustain strong earthquakes (where the ground accelerates by 30% to 40% of the normal gravity) without incurring this type of complete failure.

The 7.8 and 7.5 earthquakes appear to have caused shaking in the range of 20 to 50% of gravity. A proportion of these buildings thus failed at shaking intensities lower than the “design code”.

There are well-known problems in Turkey and elsewhere with ensuring safe building construction and adherence to seismic building codes. Similar building collapses have been seen in past earthquakes in Turkey.   

A known problem: a collapsed apartment building after the 1999 earthquake in Izmit, Turkey. Hurriyet / AP

In 1999, a huge quake near Izmit saw some 17,000 people dead and as many as 20,000 buildings collapse.

After a quake in 2011 in which hundreds of people died, Turkey’s then prime minister, Recep Tayyip Erdogan, blamed shoddy construction for the high death toll, saying: “Municipalities, constructors and supervisors should now see that their negligence amounts to murder.”

Reconstruction

Even though Turkish authorities know many buildings are unsafe in earthquakes, it is still a difficult problem to solve. Many of the buildings are already built, and seismic retrofitting may be expensive or not considered a priority compared to other socio-economic challenges.

However, reconstruction after the quake may present an opportunity to rebuild more safely. In 2019, Turkey adopted new regulations to ensure buildings are better equipped to handle shaking.

While the new rules are welcome, it remains to be seen whether they will lead to genuine improvements in building quality.

In addition to substantive loss of life and infrastructure damage, both earthquakes are likely to have caused a myriad of environmental effects, such as ruptured ground surfaces, liquified soil, and landslides. These effects may render many areas unsafe to rebuild on – so reconstruction efforts should also include planning decisions about what can be built where, to lower future risks.

For now, aftershocks continue to shake the region, and search and rescue efforts continue. Once the dust settles, reconstruction will begin – but will we see stronger buildings, able to withstand the next quake, or more of the same?

Mark Quigley, Associate Professor of Earthquake Science, The University of Melbourne

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Read More........→February 08, 2023

Earth had enough oxygen before animals appeared

@https://www.flickr.com/photos/kevinmgill/7320173118/cc-by-sa-2.0

Washington: It's a known fact that oxygen is crucial for the existence of animals on Earth, but did you know that an increase in oxygen level did not apparently lead to the evolution of the first animals. A new research conducted by the University of Southern Denmark showed that 1.4 billion years ago there was enough oxygen for animals and yet over 800 million years went by before the first animals appeared on Earth. Animals evolved by about 600 million years ago, which was late in Earth's history. The late evolution of animals and the fact that oxygen is central for animal respiration, has led to the widely promoted idea that animal evolution corresponded with a late a rise in atmospheric oxygen concentrations. Researchers Emma Hammarlund and Don Canfield said that their study indicates that sufficient oxygen in itself does not seem to be enough for animals to rise. Their analyses revealed that a deep ocean 1.4 billion years ago contained at least 4 per cent of modern oxygen concentrations. The study is published in the journal Proceedings of National Academy of Sciences. — ANI. Source: http://www.tribuneindia.com

Read More........→January 23, 2016

Volcanoes sparked 'Jurassic ice age'

Washington DC

Around 170 million years ago, our world faced an ice-age and now, the scientists are trying to explore the causes behind it. The international team of experts, including researchers from the Camborne School of Mines, has found evidence of a large and abrupt cooling of the Earth's temperature during the Jurassic Period, which lasted millions of years. The scientists found that the cooling coincided with a large-scale volcanic event, called the North Sea Dome, which restricted the flow of ocean water and the associated heat that it carried from the equator towards the North Pole region. The team suggest that it is this volcanic event, preventing the ocean flow, rather than a change in CO2 in the atmosphere (which causes today's climate change), that led to an extended Ice age in a period more synonymous with very warm conditions. Geology expert Stephen Hesselbo said that they tend to think of the Jurassic as a warm 'greenhouse' world where high temperatures were governed by high atmospheric carbon dioxide contents, adding that this study suggests that re-organization of oceanic current patterns may also have triggered large scale climate changes. Hesselbo further noted that though the occurrence of cold periods during greenhouse times have been known for a while, their origins have remained mysterious. This work suggests a mechanism at play that may also have been important for driving other climate change events in the Jurassic and at other times in Earth history. The research appears in Nature Communications. —ANI. Source: http://www.tribuneindia.com/

Read More........→December 13, 2015

New Understanding of How Shape and Form Develop In Nature

Morphogenesis: Credit: Stoyan Smoukov

Researchers have developed a new method for generating complex shapes, and have found that the development of form in nature can be driven by the physical properties of materials themselves, in contrast with earlier findings. The results, reported in the journal Nature, could enable the construction of complex structures from simple components, with potential applications in pharmaceuticals, paints, cosmetics and household products such as shampoo. Using a simple set-up -- essentially droplets of oil in a soapy water solution which were slowly frozen -- the researchers found that recently-discovered 'plastic crystal' phases formed on the inside surfaces of the droplets cause them to shape-shift into a wide variety of forms, from octahedrons and hexagons to triangles and fibres. Previous efforts to create such complex shapes and structures have used top-down processing methods, which allow a high degree of control, but are not efficient in terms of the amount of material used or the expensive equipment necessary to make the shapes. The new method, developed by researchers from the University of Cambridge and Sofia University in Bulgaria, uses a highly efficient, extremely simple bottom-up approach to create complex shapes. "There are many ways that non-biological things take shape," said Dr Stoyan Smoukov from Cambridge's Department of Materials Science & Metallurgy, who led the research. "But the question is what drives the process and how to control it -- and what are the links between the process in the biological and the non-biological world?" Smoukov's research proposes a possible answer to the question of what drives this process, called morphogenesis. In animals, morphogenesis controls the distribution of cells during embryonic development, and can also be seen in mature animals, such as in a growing tumour. In the 1950s, the codebreaker and mathematician Alan Turing proposed that morphogenesis is driven by reaction-diffusion, in which local chemical reactions cause a substance to spread through a space. More recent research, from Smoukov's group and others, has proposed that it is physical properties of materials that control the process. This possibility had been anticipated by Turing, but it was impossible to determine using the computers of the time. What this most recent research has found is that by slowly freezing oil droplets in a soapy solution, the droplets will shape-shift through a variety of different forms, and can shift back to their original shape if the solution is re-warmed. Further observation found that this process is driven by the self-assembly of a plastic crystal phase which forms beneath the surface of the droplets. "Plastic crystals are a special state of matter that is like the alter ego of the liquid crystals used in many TV screens," said Smoukov. Both liquid crystals and plastic crystals can be thought of as transitional stages between liquid and solid. While liquid crystals point their molecules in defined directions like a crystal, they have no long-range order and flow like a liquid. Plastic crystals are wax-like with long-range order in their molecular arrangement, but disorder in the orientation of each molecule. The orientational disorder makes plastic crystals highly deformable, and as they change shape, the droplets change shape along with them. "This plastic crystal phase seems to be what's causing the droplets to change shape, or break their symmetry," said Smoukov. "And in order to understand morphogenesis, it's vital that we understand what causes symmetry breaking." The researchers found that by altering the size of the droplets they started with or the rate that the temperature of the soapy solution was lowered, they were able to control the sequence of the shapes the droplets ended up forming. This degree of control could be useful for multiple applications -- from pharmaceuticals to household goods -- that use small-droplet emulsions. "The plastic crystal phase has been of intense scientific interest recently, but no one so far has been able to harness it to exert forces or show this variety of shape-changes," said the paper's lead author Professor Nikolai Denkov of Sofia University, who first proposed the general explanation of the observed transformations. "The phenomenon is so rich in combining several active areas of research that this study may open up new avenues for research in soft matter and materials science," said co-author Professor Slavka Tcholakova, also of Sofia University. "If we're going to build artificial structures with the same sort of control and complexity as biological systems, we need to develop efficient bottom-up processes to create building blocks of various shapes, which can then be used to make more complicated structures," said Smoukov. "But it's curious to observe such life-like behaviour in a non-living thing - in many cases, artificial objects can look more 'alive' than living ones." Contacts and sources: Sarah Collins, University of Cambridge, Citation: Denkov, Nikolai et. al. 'Self-Shaping of Droplets via Formation of Intermediate Rotator Phases upon Cooling.' Nature (2015). DOI: 10.1038/nature16189. Source: http://www.ineffableisland.com/

Read More........→December 12, 2015