Today we meet the people at the forefront of studying alpine plants - including how trees and plants survive in deep snow and ferocious winds.   We visit the mushroom lab to discovery why fungi are essential to life on earth and find out what seed collection in the Colorado mountains is teaching us how to adapt in a changing climate.   And while we're talking plants - Professor Peter Bernhardt of Missouri describes the thrill when the seventh millionth species was revealed and listed at his own formidable herbarium.   All that, plus meeting the winner of the 2023 Jak Kelly Award for his fascinating research on how stars are tearing apart planets - could this have been the history of our own planet Earth?