After an introduction to superconductivity, we will discuss the possibility of hot superconductivity in real materials, with a focus on recent reports [1] of superconductivity at 400 K in Cu-Pb apatite. After describing the complex structure in a friendly fashion, I will discuss qualitatively a novel mechanism [2] which makes hot superconductivity at ambient pressures a remarkable possibility. I will also summarise recent Indian efforts (Awana, NPL) and Thapa-Pandey-Ghosh (IISc) to produce new hot superconductors. Room temperature superconductivity will make macroscopic quantum mechanics part of our day today life. With a proper use, we can make the earth greener and good for all forms of life.

[1] Sukbae Lee et al, arXiv:2307.12008; arXiv:2307.12037
[2] G. Baskaran, arXiv:2307.01397