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Mount Etna has long puzzled geologists because it doesn't fit any of the three classic ways volcanoes are thought to form。 A new study suggests it may instead be fueled by ancient pockets of magma that are pushed upward through cracks created by shifting tectonic plates。 If confirmed, Etna could belong to a rare fourth category of volcano, revealin
A surprising discovery is reshaping scientists' understanding of how humans develop sharp central vision before birth。 Instead of blue cone cells migrating away from the retina's center, the study found they transform into red and green cones under the influence of vitamin A-related signals and thyroid hormones。 The findings could improve lab-grown