Decades: 490s BC 480s BC 470s BC 460s BC 450s BC - **440s BC** - 430s BC 420s BC 410s BC 400s BC 390s BC

Years: 445 BC 444 BC 443 BC 442 BC 441 BC - **440 BC** - 439 BC 438 BC 437 BC 436 BC 436 BC

**Events**:

- Meron determines the two points of the solstice
- Democritus poses the existence of indivisible particles which he calls atoms
- Zhou kao wang becomes King of the Zhou Dynasty of China

**Deaths**: