Atoms are the building blocks of all matter, from the air we breathe to every cell in our bodies. Yet despite their presence everywhere, no one has truly seen an atom with the naked eye ,until ...

Within the nucleus, the nucleolus and a stainable substance could be seen. Moreover, a number of structures (ribbons, bands and threads) appeared during cell division.

The human muscular system is complex and has many functions in the body, like mobility and stability. Learn more about the muscular system here.

NUCLEUS information resources The IAEA's NUCLEUS information resource portal provides access to over 100 scientific, technical and regulatory resources, including databases, applications, publications ...