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FILE - In this photo released by NASA, the Space Launch System (SLS) rocket with the Orion spacecraft aboard is seen at sunrise atop a mobile launcher at Launch Complex 39B at NASA's Kennedy Space Center in Cape Canaveral, Fla., Monday, April 4, 2022, in preparation for the Artemis I wet dress rehearsal test. Launch managers tried twice _ once Sunday and again Monday _ to load nearly 1 million gallons of fuel into the 322-foot (98-meter) rocket. Problems with fans at the launch pad thwarted the first effort, while a stuck valve halted the second attempt. (Joel Kowsky/NASA via AP)

More delays for NASA’s moon rocket test ahead of Artemis mission

NASA’s dress rehearsal for its mega moon rocket has been postponed twice now by technical problems that stalled a fueling test.

In this photo provided by Cambridge University Library on Tuesday, April 5, 2022, a view of the Tree of Life Sketch in one of naturalist Charles Darwin's notbeooks which have recently been returned after going missing in 2001, in Cambridge, England. Two of naturalist Charles Darwin’s notebooks that were reported stolen from Cambridge University's library have been returned, two decades after they disappeared. (Stuart Roberts/Cambridge University Library via AP)

Darwin notebooks missing for 20 years are returned, mysteriously, to Cambridge University

Peregrine falcons Annie and Grinnell atop the Campanile tower at UC Berkeley captured on the CalFalcons nest cam. (Courtesy CalFalcon)

The avian soap opera unfolding atop this Berkeley bell tower has humans riveted

In this photo released by Roscosmos Space Agency, the Russian Soyuz MS-19 space capsule lies on the ground shortly after the landing southeast of the Kazakh town of Zhezkazgan, Kazakhstan, Wednesday, March 30, 2022. The Soyuz MS-19 capsule landed upright in the steppes of Kazakhstan on Wednesday with NASA astronaut Mark Vande Hei, Russian Roscosmos cosmonauts Anton Shkaplerov and Pyotr Dubrov. (Alexander Pantiukhin, Roscosmos Space Agency via AP)

Sanctions could imperil space station, Russian space chief says

MISSION HILLS, CA - DECEMBER 31: A patient has died inside the COVID ICU at Providence Holy Cross Medical Center on Thursday, Dec. 31, 2020 in Mission Hills, CA. Wearing a yellow isolation gown, mask, gloves, and a face sheild Chaplain Anne Dauchy places her right hand gentley on the body covered by a white body bag as she talks with the family of the patient. (Francine Orr / Los Angeles Times)

How many COVID deaths are ‘acceptable’? Answer is key to moving to a post-pandemic world

LOS ANGELES, CA - JANUARY 20: Clark and Alice Campbell showcase their gravity bong from Stundenglass, with the pineapple add on, inside their apartment on Wednesday, Jan. 20, 2021 in Los Angeles, CA. The couple produce their YouTube channel, "That High Couple" from the comforts of their quant, 420 square foot Hollywood apartment. (Mariah Tauger / Los Angeles Times)

Careful, cannabis users: Bongs may create more secondhand smoke than cigarettes

This undated image made available by the National Human Genome Research Institute shows the output from a DNA sequencer. In research published in the journal Science on Thursday, March 31, 2022, scientists announced they have finally assembled the full genetic blueprint for human life, adding the missing pieces to a puzzle nearly completed two decades ago. An international team described the sequencing of a complete human genome, the set of instructions to build a human being. (NHGRI via AP)

Scientists finally finish decoding entire human genome

FILE - Dr. Manjul Shukla transfers Pfizer COVID-19 vaccine into a syringe, Thursday, Dec. 2, 2021, at a mobile vaccination clinic in Worcester, Mass. Pfizer said Wednesday, Dec. 8, 2021, that a booster dose of its COVID-19 vaccine may protect against the new omicron variant even though the initial two doses appear significantly less effective. (AP Photo/Steven Senne, File)

Q&A: I’m eligible for a second COVID-19 booster shot. Should I get it?

January 2019 photo of Bruce Willis attending the "Glass" premiere in New York City.

What is aphasia? Behind the brain disorder that has affected Bruce Willis

The coronavirus known as SARS-CoV-2, shown in purple, infects a cell, colored in green.

COVID-19 Pandemic: News, Links & Resources

Health news, ideas, advice and commentary.

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Covid-19 Pandemic and the Coronavirus

FILE - Vials for the Moderna and Pfizer COVID-19 vaccines are seen at a temporary clinic in Exeter, N.H. on Thursday, Feb. 25, 2021. The Food and Drug Administration has authorized another booster dose of the Pfizer or Moderna COVID-19 vaccine for people age 50 and up, Tuesday, March 29, 2022. (AP Photo/Charles Krupa, File)

FDA and CDC sign off on second Pfizer or Moderna booster shot for people 50 and older

The FDA has authorized another booster dose of Pfizer and Moderna’s COVID-19 vaccines for people age 50 and up, and the CDC endorsed the decision.

Medyka, Poland March 8, 2022: A young boy sits on a suitcase as Ukrainian refugees wait to be transported after crossing the border in Medyka, Poland Tuesday. (Wally Skalij/Los Angeles Times)

Russia spread anti-vax lies in Ukraine. Will it cause a COVID crisis for Europe?

FILE - Firefighters from the Marins-Pompiers of Marseille extract samples of sewage water at a retirement home in Marseille, southern France, Thursday Jan. 14, 2021, to trace concentrations of COVID-19 and the highly contagious variant that has been discovered in Britain. As coronavirus infections rise in some parts of the world, experts are watching for a potential new COVID-19 surge in the U.S. — and wondering how long it will take to detect. (AP Photo/Daniel Cole)

Experts fear U.S. won’t see next COVID surge coming

Ilana Diener plays with her son, Hudson, 3, at home in Commack, N.Y. on Nov. 30, 2021, before an appointment for a Moderna COVID-19 vaccine trial. On Wednesday, March 23, 2022, Moderna said its COVID-19 vaccine works in babies, toddlers and preschoolers, and if regulators agree it could mean a chance to finally start vaccinating the littlest kids by summer. (AP Photo/Emma H. Tobin)

What you need to know about COVID vaccines for little kids

Community workers wearing protective suits watch over a masked resident twirling a dragon shaped ribbon near a barricaded coronavirus testing site setup outside the Drum Tower, Wednesday, March 23, 2022, in Beijing, China. A fast-spreading variant known as "stealth omicron" is testing China's zero-tolerance strategy, which had kept the virus at bay since the deadly initial outbreak in the city of Wuhan in early 2020. (AP Photo/Andy Wong)

WHO: COVID-19 cases rise for 2nd straight week, deaths fall

Moderna says its low-dose COVID-19 shot works for children under 6

COVID-19 pills could be a game-changer, but doctors trying to use them face hurdles

Poop surveillance proved its worth during pandemic, could become standard practice

U.S. adult smoking rate fell during first year of pandemic

Covid-19 Vaccines

Rancho Cucamonga, CA - December 30: Joseph Monugian, 12, gives a nasal swab test at a COVID19 testing site established by San Bernardino County Department of Public Health at Rancho Cucamonga Sports Center on Thursday, Dec. 30, 2021 in Rancho Cucamonga, CA. (Irfan Khan / Los Angeles Times)

Despite rising cases, free coronavirus testing is reduced in L.A. County

Free coronavirus testing is reduced in L.A. County despite rising cases

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