nuclear

The Red Forest surrounding Chernobyl's reactor number four registers up to 100 microsieverts per hour in some areas — enough to deliver a full year's worth of normal background radiation in approximately one hour. Yet in Ramsar, Iran, people have lived for generations in homes that sit on naturally radioactive hot spring mineral deposits delivering up to 260 millisieverts per year — more than 80 times the global average background dose — with no statistically detectable increase in cancer rates. Radiation is one of the most misunderstood topics in public science communication. Understanding the most radioactive places on Earth requires understanding what radiation actually is, how it is measured, and what dose levels actually pose health risks.

The asteroid that ended the Cretaceous period 66 million years ago released energy equivalent to roughly 100 million megatons of TNT — more than a billion times the bomb dropped on Hiroshima. That is not a metaphor. Scientists have calculated this from the crater geometry, the global debris layer, and the seismic signature preserved in rock. Understanding how energy scales from a hand grenade to a world-altering asteroid impact requires only arithmetic — and it reveals why some explosions leave no survivors within thousands of kilometers.

How solar panels and wind turbines work, why their costs fell about 90%, how fast they are spreading, and what storage and grids must still solve.

Chernobyl. Fukushima. Three Mile Island. Nuclear energy carries an enormous psychological weight — but when you look at the actual data on deaths per unit of energy produced, the numbers are surprising.

Nine countries possess nuclear weapons in 2025. Russia leads with approximately 5,580 warheads; the United States has 5,044. Together they hold over 87% of all warheads on earth. China is the fastest-growing nuclear power, having added roughly 100 warheads per year since 2023. And the arms control architecture that managed US-Russian competition for five decades has effectively collapsed.