What am I riddles

I hiss. I can be poisonous. I am long. I have a forked tongue. What am I?

I have seas without water. I have forests without wood. I have deserts without sand. I have houses with no brick. What am I?

I am a home of knowledge, both banal and profound. In grand halls and small homes I can be found. I am a home for things of many leaves, but my many residents are not living trees. What am I?

I have billions of eyes, yet i live in darkness. I have millions of ears, yet only four lobes. I have no muscle, yet i rule two hemispheres. What am I?

What has one head, one foot and four legs?

I visit you every night even if you don't call me. I'm lost every day. What Am I?

I had no father, only a grandfather. I shall bear no sons, only daughters. What am I?

I can be as thin as a picture frame but my insides have many things you can see. What am I?

When you have me, you feel like sharing me. But, if you do share me, you don't have me. What am i?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth I am dissolved into air. What am I?