Anne Austin/University of Missouri-St. Louis, The Journal of Egyptian Archaeology (2022).

Because the second mummy was still wrapped, researchers analyzed it via infrared photography. It’s worth noting that archaeologists do not unwrap mummies at this point in time. The mummy turned out to be of a middle-aged woman and featured a different tattoo — a wedjat, or eye of Horus, and again an image of the god Bes, but now with a crown of feathers. The scientists also spotted a zigzag line below the other figures that probably depicted a marsh, which was associated with cooling waters used to relieve pain from menstruation or childbirth, as the researchers deduced from ancient medical texts. They propose that the two tattoos were essentially a request by the wearer for protection during childbirth.

“The Ce electrolyte is highly oxidative, which poses a challenge towards the stability of anion membrane,” Daoud said. “Thus, the stability and selectivity of anion membrane require further improvement.”

The device achieved a voltage plateau of 2.3 V at 20 mA cm − 2, energy efficiency of 71.3% at 60 mA cm − 2, and a record average Coulombic efficiency of 94% during cycling.

A follow-up to his series focused on the glow of LED-lit greenhouses, Tom Hegen’s new collection peers down on the landscape of Spain’s Almería peninsula. The German photographer is broadly interested in our impact on the earth and gears his practice toward the aerial, offering perspectives that illuminate the immense scale of human activity.

In The Greenhouse Series II, Hegen captures the abstract topographies of the world’s largest agricultural production center of its kind, which stretches across 360-square kilometers of rugged, mountainous terrain in the southern part of the country. The sun-trapping structures house plants like tomatoes, peppers, cucumbers, and watermelons that provide fresh produce to much of Europe year-round.

While 30 times more productive than typical farmland in the region, the facilities also function at a cost to the local ecosystems. “Groundwater is being polluted with fertilisers and pesticides. Some 30,000 tons of plastic waste are created each year,” Hegen tells Colossal, noting that the greenhouses are made almost entirely of plastic foil, which is shredded and discarded nearby once it’s no longer useful. “From there, wind and erosion transport it to the (Mediterranean Sea).”

DaVinci penned the aerial screw design in the 1400s, way before air travel was a thing. Now, it’s being put to action with this student-built drone.

Drones aren’t anything new —multi-rotor aircraft are becoming a bigger part of people’s lives every day. From the latest batch of up-and-coming urban air mobility companies to hobby applications, electric aircraft with four or more motors are commonplace, and generally, they use conventional multi-bladed propellers to keep themselves aloft. That’s not what’s going on with this particular drone developed by engineering students at the University of Maryland, though.

Assembled for a student design competition hosted by the Vertical Flight Society, it’s a mixture of old and new. With rotors reminiscent of Leonardo DaVinci’s aerial screw illustrations from the late 1490s, it flies like any other drone would, all while looking extremely bizarre and having interesting flight characteristics.

What would happen if a nuclear bomb 100 times the size of the one dropped on Hiroshima hit a city of 4 million people?

#Engineering

The impact of a nuclear bomb dropped in a big city has been simulated by Neil Halloran and the Nobel Peace Prize committee. Watch the video to see it.

More about “autonomous” (robot) vehicles.

The vehicle’s abilities were demonstrated on snowy terrain, at low temperatures, and in difficult road and weather conditions. The multi-purpose robotic platform is ideal for military units as it is designed to perform logistics, evacuation, reconnaissance and other special tasks.

It is engineered with low-pressure tires and built on a stable and durable transmission base. This base has amphibious properties, a long-range, and a low noise level while driving making it inconspicuous during military missions.

The vehicle can maneuver through lakes, rivers, swamps, snowy areas, deserts, and trenches up to ~3.3 ft (1 m) making it ideal for combat zones. The goal of the vehicle is to allow the military to increase both mobility and security for future missions.

The earliest genetic traces of Native American ancestry among Polynesians.

The peopling of Polynesia was a stunning achievement: Beginning around 800 C.E., audacious Polynesian navigators in double-hulled sailing canoes used the stars and their knowledge of the waves to discover specks of land separated by thousands of kilometers of open ocean. Within just a few centuries, they had populated most of the Pacific Ocean’s far-flung islands. Now, researchers have used modern DNA samples to trace the exploration in detail, working out what order the islands were settled in and dating each new landfall to within a few decades.

“The whole question of the settlement of Polynesia has been going on for 200 years,” says University of Hawaii, Manoa, archaeologist Patrick Kirch, who was not involved in the research. “This is a really great paper, and I’m happy to see it.”

Archaeologists already had hints of how this great exploration took place. Studying the styles of stone tools and carvings, as well as languages, of the people on the various islands had suggested the original ancestors traced back to Samoa and that the expansion ended halfway across the ocean in Rapa Nui, or Easter Island. But they disagreed on whether it happened in a few centuries, beginning around 900 C.E., or started much earlier and lasted 1 millennium or more.

Canada’s first commercial Small Modular Reactor (SMR)

Ontario Power Generation (OPG) has selected the BWRX-300 small modular reactor (SMR) for the Darlington new nuclear site, and will work with GE Hitachi Nuclear Energy (GEH) to deploy the reactor. Canada’s first commercial, grid-scale, SMR could be completed as early as 2028.

OPG and GEH will collaborate on SMR engineering, design, planning, preparing licensing and permitting materials, and site preparation activities. Site preparation will begin in the spring of 2022, pending appropriate approvals, OPG said. It aims to apply to the Canadian Nuclear Safety Commission (CNSC) for a construction licence by the end of next year.

Darlington is the only site in Canada currently licensed for new nuclear: OPG was granted a site preparation licence by the CNSC in 2012, after completion of an environmental assessment which included public involvement, but reductions in forecast electricity demand led to a decision to defer plans for new build. OPG last year announced it was resuming planning activities for additional nuclear power generation via an SMR at the site, rather than a large conventional reactor, as previously envisaged. The CNSC recently granted a 10-year renewal to the site preparation licence, which had been due to expire in August 2022.

Video from the Mastcam-Z instrument aboard NASA’s Perseverance Mars rover captures a closeup view of the 13th flight of the agency’s Ingenuity Mars Helicopter, on Sept. 4, 2021.

For more information about Perseverance:
mars.nasa.gov/mars2020/
nasa.gov/perseverance.

Credits:
NASA/JPL-Caltech/ASU/MSSS.