From the Phys.org website:

A team of researchers with NASA, Uppsala University, Columbia University and the Planetary Science Institute has created several simulations of conditions on Venus billions of years ago using Earth climate models and has found some instances that suggest the planet may at one time have been capable of harboring life. In their paper uploaded to the preprint server arXiv, the team describes their simulations and the factors they used in creating them.

Read more at: http://phys.org/news/2016-08-simulations-venus-life.html#jCp