The book introduces the basic concepts of nanotechnology and the various technologies to characterize nanomaterials. It also covers the nanostructural features of mammalian cells/tissues and related nanomechanical properties. In addition, the book comprehensively describes the current state-of-the-art and future perspectives of nanotechnology in biosensors. It also discusses the potential of nanotechnology for delivering the diverse cancer therapeutics and illustrates its limitation due to the potential toxicity associated with oxidative stress. It also highlights the ethical issues and translational aspects related to nanotechnology. Finally, it summarizes the applications of nanotechnology in animal biotechnology, the recent perspectives and future challenges of nanomedicines. The content of the book are beneficial for the undergraduate, postgraduate and doctoral students as well the professionals working in the area of nanotechnology and nanomedicines.