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Between 2015 and 2017, researchers dropped four brightly coloured, food-grade dyes into five sinkholes scattered across the North Rim of the Grand Canyon and then waited to see where the water carrying them would resurface. Although researchers selected sinkholes known to funnel water underground, they did not know which springs the dyes would reach or how quickly they would travel.

In Canada, wood waste from logging and areas affected by wildfires is finding an unexpected fate. A new pilot in the country has begun converting this material into a lightweight, biodegradable wood foam designed to replace products made with plastic foam, according to information released by the University of British Columbia (UBC).

In the cool, wet upland streams of Queensland's Wet Tropics, several species of rainforest frog were pushed to the brink in the 1980s and 1990s by chytrid fungus, an aquatic pathogen that attacks frog skin and has driven extinctions worldwide. For decades, researchers lacked clear data on whether some of these species still persisted in remote creeks or had vanished entirely.

A fish pulled from a Minnesota lake turned out to be older than most great-grandparents. Scientists confirmed that a bigmouth buffalo, a species long dismissed by anglers as a nuisance, lived to age 112, making it the oldest verified freshwater bony fish on record.

A wild bat trained months earlier to associate a ringtone with a food reward flew straight to that same sound years afterwards, expecting a snack. That single moment, recorded in the forests of Panama, has led biologists to reconsider how long memory can last in a wild, free-ranging mammal.

A team of young scientists at IIT Madras has built ARTSENS, a five-minute test that reveals the true age of your arteries, years before a heart attack shows any sign. Through a mission called VESPA, they are now mapping the vascular health of the whole country to build India's first early-warning guidelines.

Old tyres once lay on the sandy bottom of Guam's Cocos Lagoon, placed there in the belief that discarded rubber could be turned into a useful home for fish. Instead, the experiment was abandoned, leaving the tyres underwater for more than five decades.

A naked mole-rat can lose consciousness within seconds of entering an oxygen-free environment and still survive for 18 minutes. That was the finding of a 2017 study that tested how these underground rodents respond to conditions that would quickly become fatal for most mammals.

Indian scientists have developed RK-251, a prodrug designed to activate inside cancer cells. Experts say the early findings are promising, but human trials must establish safety and effectiveness.

When Apollo 15 astronauts David Scott and James Irwin explored the Moon in 1971, they were looking for rocks that could reveal how the lunar surface formed. During their mission, they spotted an unusually bright fragment near Spur Crater, a small feature on the slope of Hadley Delta.