Some animals have a few better senses then other living creatures. A dog's smell is better then those of a human, or other creatures. So, it's no suprised they could sniff out cancer.
Get a rod, a flat rectagular piece of materal (be sure it is not heavy), two springs and some glue or tape. Tape the rod to each of the two springs. Then, do the same to the piece of materal. You then push down the rod and let go, hopefully the whole thing bounces.
Universe: All known and unknown matter, anti-matter, and empty space that has ever existed in any time period known, and will be known. It is what exsist in the present, past, and what will exsist. Just because we don't know it exsist, then that doesn't mean it isn't their. If it does not exsist and you don't know it does or not it can't be in the Universe. If it does exsist and we don't know this, it is still in the Universe.
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