The sauna -– a small greenhouse containing black-painted bricks warmed by the sun -- may be pleasant, but it also protects the frogs from a deadly chytrid fungus that would otherwise drive them ...

SYDNEY - Hundreds of endangered Green and Golden Bell frogs huddle inside a sauna, protected from Sydney's winter chill. The sauna — a small greenhouse containing ten black-painted bricks ...

SYDNEY – Hundreds of endangered Australian green and golden bell frogs huddle inside a sauna, shielded from Sydney’s winter chill. The sauna – a small greenhouse containing black-painted ...