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physics

Ice cubes in a tray, evoking the freezer experiments at the center of Mpemba effect research.

The Mpemba Effect: Why Hot Water Sometimes Beats Cold to Freeze

For 60 years physicists couldn't agree whether hot water really freezes faster than cold. A 2025 study finally explains why the effect is real, and why it's mostly chance.

Science  · 17 Jul 2026, 09:28  · Daniel Okafor
Multiple bright lightning bolts strike behind a silhouetted water tower during a nighttime thunderstorm.

Why Thunder Sometimes Cracks and Other Times Just Rumbles

A lightning bolt makes one discharge. What you hear afterward depends entirely on how far away you're standing when the sound arrives.

Science  · 14 Jul 2026, 09:23  · Daniel Okafor
A static electricity exhibit at the SPARK Museum of Electrical Invention, illustrating the same triboelectric charging at work in a car seat.

The Physics Behind Why Your Car Door Shocks You

Static shocks from car doors spike in dry, cold weather for a specific physics reason involving friction, fabric and where the charge finally finds ground.

Science  · 11 Jul 2026, 11:13  · Daniel Okafor