— Articles —
Carrara Marble: from the sea to Michelangelo's workshop
The realms of Narnia: the geology of a film location
The geology of Machu Picchu, Inca citadel in the Andes Mountains.
Plate tectonics: caterpillar tracks of the planet.
Tethys Ocean: a vanished realm now lying in the mountains.
Planetary Boundaries: a safe world for humans.
Africa: The long voyage of an ancient continent.
Mount St. Helens erupted 40 years ago.
The Great Bend of the Niger River: two separate rivers in the past.
The origin of oxygen: When did we start breathing?
What does a geologist do and why does it matter?
What are rocks made of?
The origin of the Moon: Two impossible sister planets
Crystal clear: Can you see the inside of a crystal?
— Featured article: Lapis lazuli: Following the trace of a blue gemstone —
Article by Kathelijne Bonne
From high mountain peaks to the pharaohs.
Read how precious stone lapis lazuli found its way from the world's most ancient mines to Mesopotamia, Egypt, and Greece, and finally to the canvases of the great painters. Find out how lapis lazuli formed in the first place, as it crystallized in seams of precious rocks in the midst of plate tectonic turmoil.