Scientists have now made the most comprehensive tally yet of deep-sea exploration — 43,681 dive records dating back to 1958 — and found that humans have directly seen less than 0.001% of the deep ocean floor, an area roughly the size of Rhode Island, leaving the vast seafloor across 66% of Earth’s surface essentially unobserved.
For much of the past century, scientists believed dinosaurs were already in decline when the asteroid struck 66 million years ago — but a 2025 study published in Science found fossils in New Mexico showing they were flourishing in diverse, thriving ecosystems right up until the moment of impact