Namaskar,
When we say consciousness, what do you mean? What is ‘conscious’? That means to be aware of the world, to be aware of all that you see, to be aware of you seeing the world; all these things together constitute consciousness. So, consciousness naturally means also awareness. If you are conscious you cannot be not aware of something, especially if you put your mind to it.  Most of the people say to be conscious you need to have the brain or rather that consciousness is a product of the brain. This is the usual understanding but some of us beg to differ.

Wisdom of the Rishis

The Upanishads raise direct questions regarding the source of thought, the essence of our being and are as relevant today as they were 2000 years ago.
The Ishavasya proclaims the all pervasiveness of the totality of consciousness called Isha, the Lord and urges one to let go our narrow and self centered identity.
The  Kena (meaning Who) Upanishad concerns itself with the question of ones ID. Is there a separate I or is it merely a term used to describe the totality of cognizance.
The Mandukya examines the same idea but in a different way, exploring the states of consciousness all human beings experience, namely, the waking state, the dream state and the deep sleep state
(Available in English, Marathi, Gujarati and Malayalam)

The Mandukya Upanishad & The Alphabet of Reality (DVD)

The Mandukya Upanishad is the shortest of the Upanishads. Gaudapada’s commentary on it is quite voluminous and so also is the Shankarabhashya on it, indicating the Upanishad’s importance. It is a treatise on the waking, dream, and deep sleep states of consciousness common to all human beings, and discusses the possibility of a fourth state of consciousness, ‘turiya’ which transcends the other three. Tradition has it that Varuna deva took the form of a ‘Manduk’, a frog, and taught this Upanishad.