{"id":231298,"date":"2026-02-13T17:04:00","date_gmt":"2026-02-13T23:04:00","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2026\/02\/why-the-past-still-exists-leonard-susskind"},"modified":"2026-02-13T17:04:00","modified_gmt":"2026-02-13T23:04:00","slug":"why-the-past-still-exists-leonard-susskind","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2026\/02\/why-the-past-still-exists-leonard-susskind","title":{"rendered":"Why the Past Still Exists | Leonard Susskind"},"content":{"rendered":"<p><\/p>\n<p><iframe style=\"display: block; margin: 0 auto; width: 100%; aspect-ratio: 4\/3; object-fit: contain;\" src=\"https:\/\/www.youtube.com\/embed\/vCLrylZDQ18?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope;\n   picture-in-picture\" allowfullscreen><\/iframe><\/p>\n<p>We usually think of the past as something that no longer exists. It happened \u2014 and then it disappeared. But modern physics challenges this intuition in a profound way.<\/p>\n<p>In this video, we explore why the past may still exist \u2014 not as memory, but as structure.<\/p>\n<p>Drawing on ideas associated with Leonard Susskind, this documentary examines how relativity and modern spacetime physics reshape our understanding of time. In Einstein\u2019s framework, there is no universal \u201cnow.\u201d What is past for one observer may be present or future for another, depending on motion and frame of reference.<\/p>\n<p>This destroys the idea that the past vanishes.<\/p>\n<p>In the spacetime view, the universe is a four-dimensional structure. Events are not erased \u2014 they are located. The past is not something that disappeared. It is something that exists in a different region of spacetime.<\/p>\n<p>From this perspective, time does not flow in the way we imagine. The sense of disappearance comes from human experience, not from fundamental physics.<\/p>\n<div class=\"more-link-wrapper\"> <a class=\"more-link\" href=\"https:\/\/lifeboat.com\/blog\/2026\/02\/why-the-past-still-exists-leonard-susskind\">Continue reading \u201cWhy the Past Still Exists | Leonard Susskind\u201d | &gt;<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>We usually think of the past as something that no longer exists. It happened \u2014 and then it disappeared. But modern physics challenges this intuition in a profound way. In this video, we explore why the past may still exist \u2014 not as memory, but as structure. Drawing on ideas associated with Leonard Susskind, this [\u2026]<\/p>\n","protected":false},"author":661,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32,219,8],"tags":[],"class_list":["post-231298","post","type-post","status-publish","format-standard","hentry","category-education","category-physics","category-space"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/231298","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/661"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=231298"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/231298\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=231298"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=231298"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=231298"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}