Chihuahua Dog Breed. First discovered in Mexico, the Chihuahua is best known for being the smallest dog breed in the world. Extremely loyal to its owner, the breed has recently become a popular culture icon in the United States, most notably Paris Hilton's Chihuahua, Tinkerbell. Physical Characteristics.
Earth formed around 4.54 billion years ago by accretion from the solar nebula. Volcanic outgassing probably created the primordial atmosphere and then the ocean; but the atmosphere contained almost no oxygen and so would have been toxic to most modern life including humans.
- Humans first appeared on the earth when God created the earth. The first humans on this earth were Adam & Eve. If you need future reference, referred to the book of Gensis in the Bible, I assure you, it's not a bunch of tales, everything in the bible is true including the creation of the earth in Gensis.