More ideas from nik
Relationships between various basic mathematical structures. The arrows generally indicate addition of new symbols and/or axioms. Arrows that meet indicate the combination of structures. For instance,...

Interrelationships between various basic mathematical structures. The arrows generally indicate addition of new symbols and/or axioms. Arrows that meet indicate the combination of structures.

Mapa de la Pangea - La Tierra hace 240 millones de años

The Supercontinent Pangaea of the Triassic Period - A map of the Earth around 250 to 200 million years ago featuring Gondwanna, Laurasia and Pangaea the Supercontinent. Populated with Dinosaurs, Therapsids, Pterosaurs, and other prehistoric beasts.