I just moved into a new office at work, and found that a Bonzai was left on the desk to be thrown out in the trash by the previous person. I have never seen a Bonzai in real life, except in books, and really have no idea about how to care for it, or what variety it is. It reminds me of a mini pine tree. The problem is, I think it's dead, and I really like it. I brought it home and ran a gentle cold water flow on it in my kitchen sink to revive it, as the soil was hardened. The "needles" seem to shed as I move it around, and they are totally dried up, but I think the roots are okay. How do I know if it's dead or not? And how do I bring it back to life?