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What is a role of Saharan dust on hurricanes? 🌪 🌧 Hurricanes, including tropical cyclone rainfall (TCR), are among the most destructive weather phenomena on Earth. 🌡 💧 Traditionally, sea surface temperature or humidity in the atmosphere were considered as the main factor controlling hurricane precipitation. 🏜 ❗️ Now, scientists believe that Sahara dust plays a leading role on hurricane formation…

Could the Sahara be green again and will Africa finally need its “Great Green Wall”? 🟢 Africa’s “Great Green Wall” initiative was launched to hold back the Sahara from expanding southward. 🟢 This year, after an unusual influx of rain, scientists have compared satellite imagery on September 12, 2024 ( ⬆️ upper image), versus the same day in 2023 ( ⬆️ lower image), and have seen that the southern S…

When and why was the Sahara green? ✅ Records from ocean sediment show that the Green Sahara happens repeatedly in Earth's history. ✅ Sometime between 11,000 and 5,000 years ago , after the last ice age ended, about 9 mln square kilometers (3.5 mln square miles) of the modern Sahara Desert was a green place with lakes, where animals like elephants, hippos and antelopes feasted on thriving grasses…

Who left Paleozoic “dumbbells”? All over the world, scientists find dumbbell-shaped fossils in rock outcrops that are called Bifungites and a re not fossilized animals but burrows left in an extinct creature’s wake . ⬆️ Most are found in rocks from the Paleozoic era more than 300 million years ago. 🪱 Not long ago, Brazilian paleontologists , exploring the bed of the Sambito River in northeastern…

How does the brain store memories? 🧠 In the brain , the hippocampus region, crucial for learning and memory , records each event in three different forms or “copies” . These ‘”copies” are disseminated among different groups of neurons that arise at various stages during embryonic development. 1️⃣ The early-born neurons ensure the longevity of a memory creating a copy that, although initially weak…