Primitive Asgard cells show life on the brink of complexity
Joshua Sokol writes: An oak tree. The symbiotic fungus intertwined with its roots. A cardinal chirping from one of its branches. Our best clue yet to their shared ancestor might have arrived in electron microscope images that were unveiled in December. “Look!” said the microbiologist Christa Schleper, beaming as she held a printed, high-resolution image in front of her webcam at the University of Vienna. “Isn’t it beautiful?” The cells in the micrograph were 500 nanometer-wide orbs surrounded by a…