Coldest Possible Temperature
0 Kelvin (–459.67°F / –273.15°C)  absolute zero. At this point, all molecular motion theoretically comes to a halt.

🕒 Shortest Possible Time
5.39 × 10⁻⁴⁴ seconds the Planck time, the smallest unit of time that has meaning. Anything shorter lies outside current physics.

📏 Smallest Possible Length
1.62 × 10⁻³⁵ meters  the Planck length, where space itself may be quantized. Below this scale, the concept of “distance” breaks down.

Hottest Possible Temperature
1.42 × 10³² Kelvin  the Planck temperature, where our understanding of matter and energy collapses. Beyond it, known physics ceases to apply.