Four positive stories to start your morning: (1) El Salvador eliminates trachoma, the world's leading infectious cause of blindness; (2) Homegrown catnip lotion matches DEET as a mosquito repellent in rural Uganda; (3) Spain's 'firefighting donkeys' have kept Doñana National Park fire-free for nine years; (4) Scans show Egyptian princesses buried 4,000 years ago were skilled archers.

Four positive stories to start your morning: (1) Scientists name a tenth "walking" shark off Papua New Guinea; (2) 800 million people have gained electricity access since 2010; (3) A lonely 4-year-old's daily wave knit his whole street into a family; (4) Glow-worms return to South Downs National Park.

Four positive stories to start your morning: (1) A therapist and a stroke patient walk as one through linked robotic legs; (2) A new blood test detects womb cancer with 99% accuracy — sparing invasive exams — Health/MedTech; (3) River otters return to once-toxic city waters as a living clean-water scorecard; (4) Reno neighbors turn a dirt lot into a park with a $5,000 grant.

Four positive stories to start your morning: (1) The malaria-vaccine inventor wins Europe's top invention prize; (2) Sea turtles are having a record-smashing nesting summer; (3) Egypt uncovers a "lost" Byzantine city in the Dakhla Oasis; (4) New material makes heat "programmable".

Four positive stories to start your morning: (1) Drilling with microwaves to tap "unlimited" geothermal heat; (2) Largest-ever gravitational-wave catalog: 161 new black-hole collisions; (3) Bezos Earth Fund puts $100M into turning vacant lots into parks in 8 cities; (4) Cameron Myers, 20, becomes the fastest Australian ever over 1500m.

Four positive stories to start your morning: (1) Why some brains resist Alzheimer's: "immature" neurons that switch on survival genes; (2) Grand Rapids puts the rapids back in its river; (3) Hamilton's First Bank of the United States reopens as a free museum; (4) Special Olympics Unified Football World Cup lights up Paris.

Four positive stories to start your morning: (1) James Webb solves the "pink planet" mystery — the answer is clouds of salt — Science/Astronomy; (2) West Marin opens 14 homes for families displaced by ranch closures; (3) Shohei Ohtani hits his 300th home run — 5th-fastest ever, while also a pitcher — Sports/Baseball; (4) A fossil "mother goose of the mud" rewrites New Zealand's bird history.

Four positive stories to start your morning: (1) A man with ALS is speaking again in his own voice through a brain implant — Innovation/Brain-Computer Interface; (2) Astronomers witness the birth of a magnetar for the first time; (3) Largest-ever "Food as Medicine" study shows food banks cut hospital visits; (4) Linda Noskova, 21, wins Wimbledon after her opponent saves five championship points.

Four positive stories to start your morning: (1) A daily pill nearly doubles survival in metastatic pancreatic cancer; (2) Poland's national grid gets its first-ever offshore wind electricity; (3) Three untouched 13th-century shipwrecks surface in Menorca's "Cove of Mysteries"; (4) Kenya's Wanyonyi breaks a 27-year-old 1000m world record — in his first race at the distance — Sports/Athletics.

Four positive stories to start your morning: (1) A frog-gut bacterium cleared colorectal tumors in every mouse it was tested on; (2) An onion farmer's son becomes the fourth Indian ever to medal at a Diamond League; (3) Euclid finds the most ancient quasars ever seen, deepening the early-black-hole puzzle; (4) A jacket that pulls drinking water straight from the air.