275K views · 277 reactions | David Pogue sets out on a worldwide quest to find the key molecules and chemical reactions that have paved the way for human civilization, life, and even the universe as we know it. Stream all three episodes of NOVA l PBS' “Beyond the Elements” now on the PBS Video app. | PBS | Facebook

On May 18, 1980, the volcano, Mount St. Helens, erupted 50 miles north of Portland, Oregon. It triggered the biggest landslide in Earth's recorded history, where 200 square miles of forest were flattened. The ash cloud eventually reached the northeastern United States and 57 people died, making it the deadliest and most destructive volcanic eruption in U.S. History. PBS News' John Yang spoke with Steve Olson, author of the book “Eruption: The Untold Story of Mount St. Helens," to learn more. | P

252K views · 1.3K reactions | Researchers expose longstanding discrimination against women in science. Stream NOVA l PBS' "Picture a Scientist" now on the PBS Video app. | PBS | Facebook