Scientists found an estimated 5.5 million wild bees living beneath a New York cemetery — millions of solitary insects packed into underground burrows across just 1.5 acres, creating one of the largest nesting aggregations ever recorded at a site where the species has quietly survived for generations
Scientists mapped beneath Utah’s Great Salt Lake and found a potentially vast reservoir of freshwater hiding under one of America’s saltiest lakes — in places, it extends more than three kilometres underground
Scientists poured pink dye into Florida’s Lake Jackson to trace hidden water; about 1 month later, it appeared at Wakulla Spring through limestone caves
In 2011, scientists injected yellow-green fluorescein dye into Maui’s wastewater wells; 84 days later, it appeared near the Pacific, supporting an underground wastewater connection
Scientists led by UCLA found that permanently shaded parts of pits on the Moon stay near a constant 17°C while the exposed surface swings between 127°C and −173°C — meaning humanity's first permanent lunar address may be underground.