Earth & Space

Why Is Earth Called a Pear Shape?

What Is Fossiliferous Sandstone and How Does It Form?

The Rise and Fall of Ordovician Organisms

Black Sea: Is It Freshwater or Saltwater?

The Great Plains Drought: Causes, Effects, and Solutions

Why Lake Michigan Appears Green and What It Means

Tropical India: Its Climate, Regions, and Wildlife

The Cambrian Mass Extinction: What Happened?

What Is Pegmatite Rock and Why Is It Important?

The “Sea Under the Sea”: A Hidden Ocean Deep Within Earth

What Is a Sea Basin and How Do They Form?

Sand Fences: What They Are and How They Work

What Is the Arctic Shelf and Why Is It Important?

Europa’s Moon Ocean: What Lies Beneath the Ice?

The Dangers of Radiation on the Moon for Astronauts

Prehistoric Japan: A History of the Jomon, Yayoi & Kofun

What Was the Neoarchean Era and Why Is It Important?

Tarim Basin Mummies: Revealing Their Surprising Ancestry

Is There Water on Mars? A Scientific Look at the Evidence

What Is Oxygen Isotope Analysis? A Look at Its Uses