About 90 percent of all terrestrial plants today are angiosperms, or flowering plants. Yet finding the flower ancestral to them all has been a, ahem, fruitless search. Until now.
Although plants do turn up in the fossil record — such as the stunning 52-million-year-old tomatillos revealed earlier this year — some of the most important, evolutionarily speaking, remain elusive.
Such is the case with the first angiosperm, which researchers estimate evolved between 140 million and 250 mi