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Category: climatology – Page 79

The Future of Earth: 1,000 Years From Now.

In the last 250 years, humans have drastically and irreversibly transformed the Earth. Greenhouse gases emitted by human industries have changed the planet’s climate, presenting the single greatest threat humanity has ever faced. If humans can cause such incredible damage to the Earth in 250 years, what will our planet look like in 1,000 years time?

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Only 11 Years Left to Prevent Irreversible Damage from Climate Change.

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The Australian crater Yarrabubba is the oldest known on Earth, according to new measurements, and it might be linked to the end of a “Snowball Earth” ice age.

Yarrabubba crater in western Australia stretches roughly 40 miles across. And since its discovery in 2003, scientists have speculated it’s one of Earth’s oldest meteorite craters. Now, a team of researchers has pinned down the crater’s precise age, revealing it’s about 2.23 billion years old. This officially makes Yarrabubba the oldest known crater on Earth, surpassing the age of Vredefort crater by about 200 million years.

The meteorite impact that created Yarrabubba would have slammed into our planet at the end of one of our “Snowball Earth” ice ages, the researchers say, and it’s possible that the impact heated up our planet and ended that icy episode in Earth’s history.

The researchers presented the findings in a paper published Jan. 21 in Nature Communications.

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Spotting wildlife in these dark and dense forests teeming with insects and spiny palms is always challenging. This is because of the very nature of biodiversity in Amazonia, where there is a small number of abundant species and a greater number of rare species which are difficult to survey adequately.

Understanding what species are present and how they relate to their environment is of fundamental importance for ecology and conservation, providing us with essential information on the impacts of human-made disturbances such as climate change, logging, or wood-burning. In turn, this can also enable us to pick up on sustainable human activities such as selective logging – the practice of removing one or two trees and leaving the rest intact.

As part of BNP’s Bioclimate project, we are deploying a range of technological fixes like camera traps and passive acoustic monitors to overcome these hurdles and refine our understanding of Amazonian wildlife. These devices beat traditional surveys through their ability to continuously gather data without the need for human interference, allowing animals to go about their business undisturbed.

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A look at advanced means of altering or controlling the planet’s climate and geography, drawing on concepts proposed for terraforming other planets. We look at existing and proposed ideas of controlling the weather, creating artificial islands or mountain ranges, using orbital mirrors and shades, and many other concepts.

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Scientists have developed an efficient new way to convert methane into methanol at room temperature. The technique could help reduce greenhouse gas emissions and provide a cleaner way to make key products.

While carbon dioxide gets most of the attention, it’s not the only greenhouse gas changing the Earth’s climate. Methane is emitted in smaller amounts but is 34 times more potent, so reducing its levels remains a priority. Excess methane from industrial processes is often burned off, but that produces CO2.

A commonly sought alternative is to convert methane into methanol, which can be used to make a range of products like fuels, plastics and construction materials. The problem is, the conversion process usually requires high temperatures and pressures, which makes it energy-intensive.

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Ever considered the notion that everything around you was cooked up by aliens in a lab? Theoretical physicist and former chair of Harvard’s astronomy department, Abraham ‘Avi’ Loeb, has proposed a wild – if unsettling – theory that our universe was intentionally created by a more advanced class of lifeform.

In an op-ed for Scientific American, “Was Our Universe Created In A Laboratory?”, Loeb suggested that aliens could have created a ‘baby universe’ using ‘quantum tunneling’, which would explain our universe’s ‘flat geometry’ with zero net energy. If this discovery were proven true, then the universe humans live in would be shown to be “like a biological system that maintains the longevity of its genetic material through multiple generations,” Loeb wrote.

Loeb put forward the idea of a scale of developed civilisations (A, B, etc.) and, due to that fact that on Earth we currently don’t have the ability to reproduce the astrophysical conditions that led to our existence, “we are a low-level technological civilisation, graded class C on the cosmic scale” (essentially: dumb). We would be higher up, he added, if we possessed the ability to recreate the habitable conditions on our planet for when the sun will die. But, due to our tendency to “carelessly destroy the natural habitat” on Earth through climate change, we should really be downgraded to class D.

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New research suggests that Darwinian evolution could be happening up to four times faster than previously thought, based on an analysis of genetic variation.

The more genetic differences there are in a species, the faster evolution can happen, as certain traits die off and stronger ones get established. The team behind this latest study calls it the “fuel of evolution”, and they looked at data on 19 different wild animal groups around the world.

That data analysis revealed this raw material for evolution is more abundant than earlier estimates, and as a result we may have to adjust our expectations for how quickly animals evolve – a pertinent question in our age of climate change.

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Chopping down trees and processing the wood isn’t the most efficient or environmentally friendly way to make furniture or building materials. Scientists at MIT have now made breakthroughs in a process that could one day let us 3D print and grow wood directly into the shape of furniture and other objects.

Wood may be a renewable resource, but we’re using it up much faster than we’re replenishing it. Deforestation is having a drastic impact on wildlife and exacerbating the effects of climate change. Since our appetite for wooden products isn’t likely to change, our methods for obtaining it will have to.

In recent years, researchers have turned to growing wood in the lab. Not trees – just the wood itself, not unlike the ongoing work into cultivating animal cells for lab-grown meat, rather than raising live animals and slaughtering them. And now, a team of MIT scientists has demonstrated a new technique that can grow wood-like plant material in the lab, allowing for easy tuning of properties like weight and strength as needed.

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Climate change is already had a serious impact on global food production — from making food less nutritious to messing with the growing season of plants, to even pushing some crop species towards extinction. On top of that, the world’s oceans are already stressed by overfishing, with over 70 percent of the world’s fish stocks fully exploited, over-exploited, or depleted.

The combination of overuse and climate change could prove deadly for global food security. And by the time 2,300 rolls around, it will be too late to mitigate the impact of human activity on our food sources, both those on land and those under the sea.

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