Telomeres are protective structures located at the ends of chromosomes that help maintain the stability and integrity of the genome. They consist of repetitive DNA sequences and associated proteins that prevent the loss of genetic material during cell division. Telomeres shorten with each cell division, eventually leading to cellular senescence and aging. Research in telomeres focuses on understanding their role in cellular aging, cancer, and various age-related diseases, as well as developing potential therapeutic interventions to modulate telomere length and function.