The High Life
Anyone who remembers claims that Martian bacteria were found in a meteorite retrieved from the Antarctic icesheet will know that extraordinary claims require extraordinary evidence. Panspermia theories have gained respectability in recent years, but there's still no hard evidence for them - and the evidence needs to be diamond-hard. This isn't. Claims like this have been made before, and are still being debated (bacteria could reach the stratosphere when volcanoes loft dust into it, for instance). But it is very interesting. What are all those species of fungi and bacteria doing, way up high, at the edge of space? Are they active and continually present, or temporary visitors? Is there an ecosystem we don't know about?
EDIT: Just remembered that Robert Heinlein wrote a short story ('Goldfish Bowl') about giant insubstantial inhabitants of the stratosphere that were far in advance of human beings. Maybe those scientists should be a bit more careful when they're poking around up there.