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 poured pink dye into Florida’s Lake Jackson to trace hidden water; about 1 month later, it appeared at Wakulla Spring through limestone caves
Scientists have traced the human eye back to a tiny one-eyed ancestor that lived nearly 600 million years ago — and remnants of that ancient “cyclops” eye may still survive inside our brains as the pineal gland