AB would never leave the house.
Cave. Whatever.
I'd have preferred lichens. I've seen biggish fungi, admittedly not 8 metres high, but substantial things. But a tree sized lichen would be head spinning.
Aren't there still some huge fungi out there, but they are all underground but for small bits.
If you go through to the link from the link, it suggests that the largest living thing on earth at the moment is a fungal mat. But most of it's underground, so it's less impressive.
Yep:
But even though the spire-like mushrooms of yore--or whatever they were--are long gone, don't feel too bad for funguskind. The largest organism on Earth, says ABC, is still a huge fungal mat, a single organism spread over 2,200 acres of forest in eastern Oregon.
I thought I was doing pretty good by reading the first half of the linked article.
The thing that gets me about the linked article is the link underneath the clickbaitiest headline I have ever seen on a science piece: "The Fungus in Your Cheese Is Having Weird Sex"
Though I suppose it would be clickbaitier still if it read "The Fungus in Your Cheese Is Having Weird Sex -- AND THAT'S WHY YOU'LL GET CANCER"