EarthSun-blocking dust from asteroid impact drove the dinosaur extinction The Chicxulub impact 66 million years ago filled the sky with fine silicate dust, which blocked out sunlight and lingered for 15 years News
LifeIchthyosaurs used a barren region of the ocean as an ancient nursery Marine reptiles called ichthyosaurs, which resembled whales and dolphins, seem to have gathered to give birth in a quiet ocean area with no predators News