CfA astronomers Jonathan Irwin, David Charbonneau and Jennifer Winters were members of a team that probed the evolution of the hot Neptune K2-25, a transiting exoplanet with an orbital period of only 3.48 days, an estimated mass of roughly about seven Earth-masses, and a highly eccentric orbit (value of 0.27; its maximum distance from the star exceeds its minimum distance by about 70%). K2-25 has the advantage of being in a young stellar cluster whose age is well-constrained at about 650 million years. This young age tests whether there is time for the migration mechanism to work, whether or not such a process could leave the planet with its large observed eccentricity, and not least, whether such a young host star might be active enough to have complicated the dataset with starspots (the star itself is seen to rotate in 1.88 days).