This document is an introduction to a biology unit that covers DNA, viruses, bacteria, prokaryotes, and eukaryotes. It includes a table of contents listing the relevant Virginia state standards for each topic. It then introduces a Pearltree created by the authors that organizes resources about these subjects visually. The Pearltree includes blogs, virtual labs, videos, audio files and other interactive elements to engage different learning styles. Students are invited to explore the hidden world of biology through this curated collection of materials.