Astronomers find 1st evidence of heavy black hole seeds in the early universe

An illustration of a supermassive black hole with a mass billions of times that of the sun. Did these cosmic titans grow from massive black hole seeds?

Astronomers may have discovered the first evidence of heavy black hole "seeds" in the early universe. 

These so-called seeds could help explain how some supermassive black holes with masses equivalent to millions, or even billions, times that of the sun could have grown quickly enough to exist less than 1 billion years after the Big Bang.