Decades: 400s BC 390s BC 380s BC 370s BC 360s BC - **350s BC** - 340s BC 330s BC 320s BC 310s BC 300s BC

355 BC 354 BC 353 BC 352 BC 351 BC - **350 BC** - 349 BC 348 BC 347 BC 346 BC 345 BC

- Aristotle argues for a spherical Earth using lunar eclipses and other observations. Also he discusses logical reasoning in Organon.

- Dicaearchus - Greek philosopher, cartographer, geographer, mathematician and polygraph
- Cassander, later King of Macedonia (approximate date).