First ‘Time Crystal’ Built Using Google’s Quantum Computer | Quanta Magazine

Like a perpetual motion machine, a time crystal forever cycles between states without consuming energy. Physicists claim to have built this new phase of matter…
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Turkey Is Next as Wildfires Afflict Mediterranean Countries – The New York Times

The Turkish authorities said they were investigating the causes of fires that killed at least four people and threatened popular tourist destinations.
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Reconceptualizing Lithuania’s Importance for U.S. Foreign Policy – Foreign Policy Research Institute

This report is part of FPRI’s collaboration with Eastern Europe Studies Centre in Vilnius, Lithuania and can also be viewed here
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The Indigenous Archaeologist Looking for Residential School Graves in Canada – The New York Times

Kisha Supernant has brought radar technology to the search for burial sites in Canada while she works to reshape her profession’s relationship with Indigenous communities.
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Neanderthals Hunted with Leaf-Shaped Spears, Archaeologists Say | Archaeology, Paleoanthropology |

The artifact is 7.6 cm (3 inches) long, 4.1 cm (1.6 inches) wide, 0.9 cm (0.35 inches) thick, and has a mass of 28 grams.

“Our results document how the tool was made, used and why it was discarded,” Professor Conard said.

“Thanks to a series of four ESR-dates the find is securely dated to over 65,000 years ago.”

“Until now finds of leaf points were interpreted as belonging to the period between 45,000 and 55,000 years ago — the last cultural phase of Neanderthals in Central Europe,” he added.

“The new results demonstrate that our assumptions about the dating of the cultural groups of the late Neanderthals were wrong and need revision.”

Using detailed microscopic analyses, the researchers found that the leaf point was mounted on a wooden shaft.

“Damage to the tip indicates that the artifact was used as a hafted spear point, and that the spear was likely thrust into prey rather than being thrown,” they said.

“Neanderthals used plant-based glue and bindings made from plant fibers, sinew, or leather, to secure the leaf point to the spear.”

“They clearly used the spear for hunting. While they re-sharpened the tool it broke, leading to its discard.”
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Eunice Foote was the first to chart climate change physics

Eunice Foote discovered that carbon dioxide absorbs heat, and theorized that if the Earth’s air filled with more CO2, the planet’s temperature would rise.

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Swimming gives your brain a boost – but scientists don’t know yet why it’s better than other aerobic activities

Mounting research shows that going for a swim can preserve memories, reduce mood disorders and increase mental acuity in all age groups.
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Study examines role of deep-sea microbial predators at hydrothermal vents | NSF – National Science Foundation

Hydrothermal vent fluids from the Gorda Ridge spreading center in the Pacific Ocean create a biological hub of activity in the deep sea. There in the dark ocean, a unique food web thrives not on photosynthesis but on chemical energy from the venting fluids. Among the creatures having a field day is a diverse assortment of microbial eukaryotes, or protists, that graze on chemosynthetic bacteria and archaea.

This protistan grazing, a key mechanism for carbon transport and recycling in microbial food webs, exerts a higher predation pressure at hydrothermal vent sites than in the surrounding deep-sea environment, a U.S. National Science Foundation-funded paper reports.

“Our findings provide a first estimate of protistan grazing pressure in hydrothermal vent food webs, highlighting the important role diverse protistan communities play in deep-sea carbon cycling,” according to the paper in Proceedings of the National Academy of Sciences.

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Sendhil Mullainathan Thinks Messing Around is the Best Use of Your Time – People I (Mostly) Admire –

He’s a professor of computation and behavioral science at the University of Chicago, MacArthur “Genius Grant” recipient, and author. Steve and Sendhil laugh their way through a conversation about the importance of play, the benefits of change, and why we remember so little about the books we’ve read — and how Sendhil’s new app solves this problem. 
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Algal blooms an emerging threat to clear lakes worldwide | NSF – National Science Foundation

Many of the world’s most iconic clear lakes are degrading at an alarming rate — shallow, nearshore lake bottoms are being carpeted by bright green fronds of slimy algae, especially during the summer. These filamentous algal blooms, known as FABs, need lots of light, so they occur at the same lake edges where people want to swim and play.

Researchers are unsure why FABs are suddenly showing up in remote mountain lakes — as well as in some large lakes such as Lake Tahoe in the U.S., Lake Baikal in Russia and Lake Wakatipu in New Zealand — but an international team of lake scientists is tackling the problem. In a recent paper, they explore how nutrient pollution, climate change, loss of aquatic animals that eat algae, and invasive species are contributing to the increased occurrence of green bottoms.
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