'In the Arctic, some of these organisms consisting of an alga & a fungus may be 4,000 years old'
lichens
SCIENCE: In the Arctic, some of these organisms consisting of an alga & a fungus may be 4,000 years old
In the Arctic, some of these organisms consisting of an alga & a fungus may be 4,000 years old
In the Arctic, some of these organisms consisting of an alga & a fungus may be 4,000 years old
SCIENCE
lichens
SCIENCE