The finding overturns a previous belief that microbes in extreme conditions are barely getting by in their uninviting homes.
Scientists know that microbial life can survive under some extreme conditions—including, hopefully, harsh Martian weather. But new research suggests that one particular microbe, an algal species found in Arctic ice, isn’t as immobile as it was previously believed. They’re surprisingly active, gliding across—and even within—their frigid stomping grounds.
In a Proceedings of the National Academy of Sciences paper published September 9, researchers explained that ice diatoms—single-celled algae with glassy outer walls—actively dance around in the ice. This feisty activity challenges assumptions that microbes living in extreme environments, or extremophiles, are barely getting by. If anything, these algae evolved to thrive despite the extreme conditions. The remarkable mobility of these microbes also hints at an unexpected role they may play in sustaining Arctic ecology.
“This is not 1980s-movie cryobiology,” said Manu Prakash, the study’s senior author and a bioengineer at Stanford University, in a statement. “The diatoms are as active as we can imagine until temperatures drop all the way down to -15 C [5 degrees Fahrenheit], which is super surprising.
