The Ocean Cleanup Readies Historic Launch But Challenges Lie Ahead
Five years ago, then-teenager Boyan Slat made headlines around the world for his plastic-capturing concept. Now at the age of 23, the Dutch inventor is ready to live his dream of cleaning the Great Pacific Garbage Patch, a whirling vortex of trash and plastics floating off the coast of California.
Everything still looking good for @TheOceanCleanup launch this Saturday at noon Pacific time. Great Pacific Garbage… https://t.co/ORSCKHtdpd— Boyan Slat (@Boyan Slat)1536090115.0
"System 001" consists of a 600-meter-long floating pipe with a tapered 3-meter skirt attached underneath to catch debris like "a giant wind-and-wave-powered Pac Man," Slat said.
It will spend two weeks at a Pacific Trials location about 250-350 nautical miles offshore before being towed out to the garbage patch another 1,000 nautical miles away.
The captured plastic will be collected by a vessel every month or so. The debris will then be sorted for recycling or up-cycled to create new products.
If all goes to plan, 60 of these systems will be deployed to sea with the aim of removing 50 percent of the garbage patch within 5 years.
The Ocean Cleanup
It took years of research and development for Slat and his team at The Ocean Cleanup to get to this point, including 273 scale model tests, six at-sea prototypes and a detailed mapping of the Great Pacific Garbage Patch. The project has raised about $40 million in funding from investors, Wired reported.
The concept, however, has received a fair share of criticism. There's the fear that it could harm fish or other bycatch. Others have suggested that upstream designs (i.e. Baltimore Harbor's solar-powered trash wheel) and policy solutions will better stem the flow of plastics before it reaches sea. Also, the idea of a "patch" of garbage where debris floats on the surface of the water is a myth—plastics are found across the seafloor and vertically throughout the ocean.
In a recent Ocean Cleanup video, he explained the three main risks:
1) That waves and winds could alter the system's Pac-Man shape;
2) While scaled-down models have been able to collect plastic down to the millimeter range, Slat worries that the full-scale system won't be able to efficiently collect and retain plastic out at sea;
3) From high waves, strong currents, UV rays and corrosive sea salt, Slat wonders if the system will be able to survive intense oceanic conditions. "The ocean is a very destructive environment," he said.
"We believe that every risk that we can eliminate in advance we have been able to eliminate, but that doesn't mean that all risks have been eliminated," Slat said in the video. "Truly, the only way to prove that we can rid the oceans of plastic is to actually go out there and deploy the world's first ocean cleanup system."
For those interested in watching the launch, click here for a livestream starting at 12 p.m. Pacific time.
The Ocean Cleanup
Sweden's reindeer have a problem. In winter, they feed on lichens buried beneath the snow. But the climate crisis is making this difficult. Warmer temperatures mean moisture sometimes falls as rain instead of snow. When the air refreezes, a layer of ice forms between the reindeer and their meal, forcing them to wander further in search of ideal conditions. And sometimes, this means crossing busy roads.
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By Aaron W Hunter
A chance discovery of a beautifully preserved fossil in the desert landscape of Morocco has solved one of the great mysteries of biology and paleontology: how starfish evolved their arms.
The Pompeii of palaeontology. Aaron Hunter, Author provided<h2></h2><p>Although starfish might appear very robust animals, they are typically made up of lots of hard parts attached by ligaments and soft tissue which, upon death, quickly degrade. This means we rely on places like the Fezouata formations to provide snapshots of their evolution.</p><p>The starfish fossil record is patchy, especially at the critical time when many of these animal groups first appeared. Sorting out how each of the various types of ancient starfish relate to each other is like putting a puzzle together when many of the parts are missing.</p><h2>The Oldest Starfish</h2><p><em><a href="https://www.biorxiv.org/content/10.1101/216101v1.full.pdf" target="_blank" rel="noopener noreferrer">Cantabrigiaster</a></em> is the most primitive starfish-like animal to be discovered in the fossil record. It was discovered in 2003, but it has taken over 17 years to work out its true significance.</p><p>What makes <em>Cantabrigiaster</em> unique is that it lacks almost all the characteristics we find in brittle stars and starfish.</p><p>Starfish and brittle stars belong to the family Asterozoa. Their ancestors, the Somasteroids were especially fragile - before <em>Cantabrigiaster</em> we only had a handful of specimens. The celebrated Moroccan paleontologist Mohamed <a href="https://doi.org/10.1016/j.palaeo.2016.06.041" target="_blank" rel="noopener noreferrer">Ben Moula</a> and his local team was instrumental in discovering <a href="https://www.sciencedirect.com/science/article/abs/pii/S0031018216302334?via%3Dihub" target="_blank" rel="noopener noreferrer">these amazing fossils</a> near the town of Zagora, in Morocco.</p><h2>The Breakthrough</h2><p>Our breakthrough moment came when I compared the arms of <em>Cantabrigiaster</em> with those of modern sea lilles, filter feeders with long feathery arms that tend to be attached to the sea floor by a stem or stalk.</p><p>The striking similarity between these modern filter feeders and the ancient starfish led our team from the University of Cambridge and Harvard University to create a new analysis. We applied a biological model to the features of all the current early Asterozoa fossils in existence, along with a sample of their closest relatives.</p>
Cantabrigiaster is the most primitive starfish-like animal to be discovered in the fossil record. Aaron Hunter, Author provided<p>Our results demonstrate <em>Cantabrigiaster</em> is the most primitive of all the Asterozoa, and most likely evolved from ancient animals called crinoids that lived 250 million years before dinosaurs. The five arms of starfish are a relic left over from these ancestors. In the case of <em>Cantabrigiaster</em>, and its starfish descendants, it evolved by flipping upside-down so its arms are face down on the sediment to feed.</p><p>Although we sampled a relatively small numbers of those ancestors, one of the unexpected outcomes was it provided an idea of how they could be related to each other. Paleontologists studying echinoderms are often lost in detail as all the different groups are so radically different from each other, so it is hard to tell which evolved first.</p>
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