Future Linear Colliders

<!--HTML-->Future Linear Colliders can open the way to new exciting physics. After a brief introduction to Linear Colliders, the physics motivation and history, the two schemes presently envisaged for future Linear Colliders are presented: - The International Linear Collider (ILC) based on Super-Conducting RF technology with colliding beams in the TeV energy range - The Compact Linear Collider (CLIC) based on a novel Two Beam Acceleration concept to extend Linear Colliders into the Multi-TeV colliding beam energy range. Their planned performances, challenges and key issues, the present status and the planned R&D to develop these two technologies will be shown. Prerequisite knowledge: Common sense and a little bit of physics