To ensure the ancient plants' own new seeds were viable, the team artificially pollinated the flowers and germinated the resulting seeds. Get this: The seeds from the ancient plants fared even better than the modern ones. The regenerated ancient plants had a 100 percent germination rate, while the control plants had an 86 to 90 percent rate. The research suggests that old age and ice would not have prevent these plants from flowering again someday — if anything, it would be the radioactive cycle of the planet itself. Like anything on Earth, the plants were exposed to low levels of gamma radiation from the radioactive decay of elements in the crust. Over 30,000 years, that adds up to a fair amount of gamma radiation. The scientists calculated that the fruits got a dose of 0.07 kGy of gamma radiation, and they say this is now the maximal dose after which tissues will remain viable and seeds will still germinate. If someone finds a plant older than 30,000 years, maybe that number will go up.