Astronomer David Field of the University of Aarhus says, "The fainter the galaxy, the more distant it is. And given that light travels at a finite speed, faint galaxies are also the oldest."
Women may make new eggs throughout their reproductive years—challenging a longstanding tenet that females are born with finite supplies, a new study says.
Women may make new eggs throughout their reproductive years—challenging a longstanding tenet that females are born with finite supplies, a new study says.