Here is a bit more information on their study and findings:

In their study, which has been published in the Monthly Notices of the Royal Astronomical Society¸ the researchers observed around 10,000 galaxies currently present in the Universe using a survey of the sky created by the Herschel ATLAS and GAMA projects.

The results suggest a massive transformation in which disc-shaped galaxies became oval-shaped galaxies.

“This study is important as it establishes statistics showing that almost all stars formed in spiral galaxies in the past, but a large fraction of these now appear as large, dead, elliptical galaxies today. This study will require us to refine the models and computer simulations that attempt to explain how galaxies formed and behaved over the last 13 billion years.”

And below is a related video about galactic formations with incredible pics from the Hubble telescope.

thanks to eurekalert.org for the great info