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A subject coughing in a cyclic incident. A qualitative examination of airborne droplet transmission with and without wearing a surgical mask. The top and bottom figures show the results at 2 s and 3 s, respectively. Wearing a surgical mask that exhibits an initial efficiency of ～91%. This cannot prevent the transport of the saliva droplets away from the subject. Many droplets penetrate the mask shield and some saliva droplet disease-carrier particles can travel more than 1.2 m. For visualization, the droplets were scaled by a factor of 600 compared to their actual size. The environmental conditions are zero wind speed, ambient temperature 20 °C, pressure 1 atm, and relative humidity 50%. The mouth temperature is 34 °C and the face skin temperature is 32 °C. 775

A Saudi mission that resulted in the apparent death of journalist Jamal Khashoggi in Istanbul was organized by a high-ranking officer with the General Intelligence Presidency, Saudi Arabia's main intelligence service, three sources familiar with the case told CNN.One of those sources described the officer as close to the inner circle of Crown Prince Mohammed bin Salman. It is unclear whether the crown prince authorized an interrogation, abduction or killing. Several officials CNN spoke with said the mission could not have happened without the direct knowledge of the 33-year-old crown prince, the kingdom's de facto ruler, who is known by his initials "MBS."A second source said the officer assembled and sent his own team to interrogate Khashoggi. They suspected Khashoggi of having ties to the kingdom's arch rival, Qatar, the source said. There has been no evidence to substantiate Khashoggi had such ties.Another source told CNN the mission's organizer was not transparent about what he told Riyadh, which, the source said, explained why the government had no clear information for days. 1105

A new survey shows the COVID-19 pandemic is giving people more faith in science. 3M's State of Science Index was encouraging for scientists and medical professionals, but the results also showed a lack of diversity is a major obstacle in the fields of Science, Technology Engineering and Math or STEM."They did the survey in 2019 and when they came to release the information now in 2020, obviously this whole pandemic had occurred and so they wanted to see if the answers and results had changed. So, they ran the survey again, very quickly. What they found was that this pandemic pulse or the information they found in 2020 in the middle of the pandemic has been just incredible," said Dr. Kate Biberdorf, an Associate Professor at the University of Texas at Austin and a 3M partner.Dr. Biberdorf says amid the pandemic, with scientific research and discoveries front and center, 89 percent of their respondents said they trust science. Pre-pandemic, Dr. Biberdorf says just 24 percent of people said they would speak up and advocate for science. Now, 54 percent said they would. A big difference in less than a year."The main things that just keep standing out to me is that our skepticism is down, our trust is up. We are leaning towards our experts, we’re talking to our scientists," said Dr. Biberdorf.However, the 3M State of Science Index also showed a large portion of Americans were discouraged from getting into STEM-related careers. "One of the questions we asked was, 'Have you ever been discouraged to pursue STEM in any way?' And what we noticed was there was a really interesting trend when it came to our age demographic," said Dr. Biberdorf.Results showed 9 percent of Baby Boomers were discouraged, 24 percent of millennials and 28 percent of Generation Z Americans, which is an upward trend. So, 3M asked why they were discouraged."Globally, the number one answer was just a lack of access to science classes. They just don't have access, they can’t get the acid, they can’t get the science kit. But in the United States, of those who were discouraged to pursue STEM, what we noticed was that our number one answer was inequalities due to gender, race and ethnicity, so that is glaring," said Dr. Biberdorf.Boukham Sriri-Perez is a high school physics teacher at Duncan Polytechnical High School in Fresno, CA. "The majority of my students in my AP Physics class are male and I have very few female students. Last year, I only had one. I believe that it is my responsibility, that I have to be really intentional about how I teach my female students in the class," said Sriri Perez. She says she tries to encourage many of her female students to give them the confidence to go into physics or other science fields and make a huge difference in the world. Sriri-Perez works for Fresno Unified School District, the same district she attended growing up. Sriri-Perez gets emotional recalling how influential and inspiring her own high school science teachers were, but says there was a lot she battled to get to where she is today."However, there’s one piece that I think I had to learn on my own as a female student and as a minority and as a refugee, is that I live in two different cultures," said Sriri-Perez. A culture that she says didn't see women in STEM-related fields. Sriri-Perez says educators can play a huge role in encouraging future STEM leaders who are minorities and women. 3416

A toddler hanging from the roof after crawling out of his bedroom window managed to come away unscathed after falling into a passerby's arms.It's a situation that could have ended tragically if not for the quick actions of a good Samaritan.Police report Jill Harper happened to be driving by the 1300 block of Mills Street in Sandusky, Ohio and saw the toddler hanging from the edge of the roof. She ran over to help.According to the police report, the child fell into her arms, and she brought him inside."When I caught him I remember thinking, 'Oh my God, I caught him,'" said Harper."When I started pounding on the house, that's when he fell, and my hand was pounding.  So when he fell, he kind of came back and hit my arm, and then I caught him."Police said they did not notice any obvious bumps and bruises. The Sandusky Fire Department responded to the scene, looked him over and found no injuries.Kelsie Hellman, the boy's mother's cousin, signed a refusal form, not wanting him to be transported to the hospital, according to police.Sandusky police said the boy is currently in the custody of Summit County Children Services. Hellman told police she is trying to gain custody of the boy, whom she has looked after since he was 3 months old.How did he get out there? Hellman told police she was using the bathroom when the incident happened. She said the boy must have gone around the baby gate she put at the bottom of her stairs, allowing him to get up to his room where the window was left slightly open. The boy then apparently slid through the window, which opens onto the roof.Meanwhile, Sandusky Police Detective Kevin Youskievicz told Scripps station WEWS in Cleveland, he believes the child could have suffered serious injuries if Harper hadn't acted quickly."I can only describe her as a hero, she's a hero," Youskievicz said."Everyone says we need heroes, she is one,"According to the report, Hellman said her husband was fixing the window so the boy could not crawl out of it again. 2079

A preschool teacher was arrested on Wednesday after deputies say admitted to biting a 2-year-old student on the face.Heather Marcotte, 28, has been arrested on a charge of felony cruelty to a juvenile in Louisiana.The mother of a 2-year-old student called the St. Tammany Parish Sheriff’s Office saying that when she picked her son up from school, she noticed the bite mark on his cheek.The mother said an administrator at the school informed her that her son’s teacher reported that she left the mark on the child "when her mouth accidentally hit his face" and that the teacher had been terminated following the incident, according to the Sheriff's office.Marcotte admitted to deputies that she bit the child after she became frustrated and agitated with his behavior. A warrant was obtained for her arrested and she was taken into custody.Northlake Christian says it takes kids as young as six weeks old and is a “special place where your child will be loved and nurtured,” according to the Associated Press.In a statement to the Associated Press, Head of School Monty Fontenot says: “We’ve handled it internally and there’s no further comment.”Mary Stringini is a digital reporter for ABC Action News. Follow her on Twitter @MaryWFTS. 1275