Chernobyl particles reveal unexpectedly stable nuclear fuel after 40 years

"Stable" here means mechanically stable (they don't fall apart as quickly as was expected), not radiologically stable (the radioactive elements, of course, still decay at their normal rate).

The headline sounds weirdly positive... but it's "stable" as in [ed.: ecologically] "long-lived". Very much not a good thing.

40 years and counting, vs 1 year for Hiroshima