We asked 16 TED speakers to share their Earth-friendly gift recommendations — and here’s their green gift list.

Environmental groups often use frightening images to sound the alarm on big issues — but to be effective at inspiring action, climate-related visuals need to promote hope rather than fear. Here, eight designs with an optimistic vision, and how the artists are driving change in their own lives.

By making just a few basic corrections, you can ease your back strain and discomfort, says posture expert Esther Gokhale.

Who should go to Mars? Fancy growing a chair? Top creative thinkers share their thoughts on what the future might look like, in films shot at TED2015 by Jesse Dylan.