Chernobyl's blue dogs spark radiation theories, but expert Timothy Mousseau shares "likely" cause behind colorful canines spotted roaming exclusion zone.

Several dogs with blue fur were spotted in October roaming the site of the 1986 nuclear disaster. (Credit: Clean Futures Fund via Storyful)

The blue dogs spotted at Chernobyl are not blue because of radiation but rather because they rolled in porta potty chemicals, according to a scientific advisor for Dogs of Chernobyl.

The UN nuclear watchdog has said that the protective structure surrounding the exploded reactor at Chernobyl can no longer perform its main function of blocking radiation, after a Russian drone strike earlier this year.

The protective steel shield at Chernobyl — built to lock away radiation from the world’s worst nuclear disaster — has been severely compromised after a drone strike earlier this year, the International Atomic Energy Agency (IAEA) has warned.

The protective shelter built to contain radioactive material from the 1986 Chernobyl disaster can no longer block radiation after an attack by Russia. A suspected Russian drone hit the power plant in northern Ukraine earlier this year, starting a fire in the outer cladding of the massive steel structure.