Ammonium is the secret ingredient in stable, efficient, scalable perovskite solar cells

A new pathway to creating durable, efficient perovskite photovoltaics at industrial scale has been demonstrated through the first effective use of lead acetate as a precursor in making formamidinium-caesium perovskite solar cells. Members of Exciton Science, based at Monash University, were able to create perovskite solar cells with 21% efficiency,…

Live updates: Russia’s war in Ukraine and Zelensky’s visit to the US

John Kirby, the strategic communications coordinator at the National Security Council, talks to “CNN This Morning” on December 21. (CNN) US President Joe Biden invited his Ukrainian counterpart to Washington this week because he determined the war in Ukraine had entered a new stage, a top US official said Wednesday.…

Russia’s militarization of the Arctic shows no sign of slowing down | CNN

CNN  —  Russia has continued expanding its military bases in the Arctic region despite significant losses in its war on Ukraine, according to a new series of satellite images obtained by CNN. NATO Secretary General Jens Stoltenberg also told CNN in an exclusive interview on Friday there is now “a…

Live updates: Trump’s taxes discussed at committee meeting

There have been questions around former President Donald Trump‘s wealth and taxes for decades.Trump has long claimed that he is enormously wealthy businessman, building a personality and brand on that narrative. He spent years protecting that image — keeping his business dealings, net worth and how much of his money…

Biodegradable medical gowns produce harmful emissions

Biodegradable medical gowns, designed to be greener than conventional counterparts, actually produce harmful greenhouse gases, according to new research published Dec. 20 in the Journal of Cleaner Production. The use of disposable plasticized medical gowns — both conventional and biodegradable — has surged since the onset of the COVID-19 pandemic.…

Taliban suspend university education for women in Afghanistan | CNN

CNN  —  The Taliban government has suspended university education for all female students in Afghanistan, the latest step in its brutal clampdown on the rights and freedoms of Afghan women. A spokesman for the Afghan Ministry of Higher Education confirmed the suspension to CNN on Tuesday. A letter published by…

Lionel Messi Fast Facts | CNN

CNN  —  Here is a look at the life of soccer player Lionel “Leo” Messi, who plays for Argentina’s national team and Paris Saint-Germain. Birth date: June 24, 1987 Birth place: Rosario, Argentina Birth name: Lionel Andrés Messi Father: Jorge Messi, factory worker Mother: Celia Cuccittini de Messi Marriage: Antonela…

King Juan Carlos I Fast Facts | CNN

CNN  —  Here’s a look at the life of the former King of Spain. Birth date: January 5, 1938 Birth place: Rome, Italy Birth name: Juan Carlos Alfonso Victor Maria de Borbon y Borbon Father: Don Juan de Borbon y Battenburg, Count of Barcelona, third son of King Alfonso XIII…

Live updates: Russia’s war in Ukraine

A long-exposure photo shows a view of a road in Kyiv during a power outage on Monday. (Mustafa Ciftci/Anadolu Agency/Getty Images) Across Ukraine, power engineers are engaged in their daily battle to restore electricity to homes and public buildings after Russian missile and drone attacks — but they are also tackling…

Dutch prime minister apologizes for the Netherlands’ role in the slave trade | CNN

CNN  —  Dutch Prime Minister Mark Rutte apologized Monday for the Netherlands’ “slavery past,” which he said continues to have “negative effects.” Rutte’s comments were part of the Dutch government’s wider acknowledgment of the country’s colonial past, and an official response to a report entitled “Chains of the Past” by…

How a test drive may lead to an electric vehicle purchase

There’s something about test driving an electric vehicle that boosts some potential buyers’ personal identity as being early adopters of the latest technologies, a new study has found. And that strengthened sense of being a timely user of new gadgetry was linked to a higher likelihood that the test-driver would…

Do polar bear paws hold the secret to better tire traction?

Traction is important. Humans have been continually interested in discovering how to better move across wet or frozen surfaces safely — whether to improve shoes for walking on sidewalks or tires to maneuver the roadways. But what makes it possible for some arctic animals to walk and run across the…

Serotonin 2C receptor associated with obesity and maladaptive behavior

A collaborative study involving Baylor College of Medicine, the University of Cambridge and the University of Exeter Medical School reveals a new gene associated with obesity and maladaptive behavior. The evidence shows that rare mutations in the gene for the serotonin 2C receptor play a role in the development of…

Freed Russian arms dealer Viktor Bout visits occupied Ukraine

Heating has been fully restored in Kyiv Sunday, two days after a barrage of Russian missiles targeted the city. “All heat supply sources are operating normally,” Mayor Vitali Klitschko said in a post on Telegram, adding that public utilities will work throughout Sunday on “individual buildings, where there may be minor heating problems.”  The broader Kyiv region, however, continues to…

Live updates: Russia’s war in Ukraine

Heating has been fully restored in Kyiv Sunday, two days after a barrage of Russian missiles targeted the city. “All heat supply sources are operating normally,” Mayor Vitali Klitschko said in a post on Telegram, adding that public utilities will work throughout Sunday on “individual buildings, where there may be minor heating problems.”  The broader Kyiv region, however, continues to…

Argentina beats France in the 2022 World Cup final

Fireworks explode as Argentina’s team receives the trophy at the end of the World Cup soccer match final at Lusail Stadium in Qatar on December 18. (Hassan Ammar/AP) Several international bodies have renewed sharp criticisms of Qatar and FIFA for glaring human rights abuses and the exploitation of migrant workers before…