Venus could have been habitable for billions of years (2019)
Growing up I absorbed all the space stuff I could find.But it wasn't until recently that I realized that the solar system didn't just form into some static natural state where it largely didn't change until say the sun was finished with it's lifespan.Rather it evolves, changes, planets are habitable, then not, moons are formed and break up, even frozen planets are geologically active and are changing, Saturn's rings are relatively recent and etc.Not sure how I didn't pick up on that.