{"product_id":"fermia-the-fermi-paradox-physics-t-shirt","title":"Fermia – The Fermi Paradox Physics T-Shirt","description":"\u003cp\u003eFermia sits on a rocky outcrop with a radio dish, ear cupped to a starfield. It stays silent.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eIf the galaxy is old and full of planets, and travel or signalling between stars is possible, why do we see no sign of anyone else? The Drake equation breaks the question into a chain of factors, from the rate of star formation to how long a civilisation stays detectable. Most of those factors are unknown, so the equation organises our ignorance rather than giving an answer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eN = R* · f_p · n_e · f_l · f_i · f_c · L\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eN: number of detectable civilisations in the galaxy\u003c\/li\u003e\n\u003cli\u003eR*: star formation rate (stars per year)\u003c\/li\u003e\n\u003cli\u003ef_p: fraction with planets\u003c\/li\u003e\n\u003cli\u003en_e: habitable planets per system\u003c\/li\u003e\n\u003cli\u003ef_l, f_i, f_c: fractions with life, intelligence, detectable signals\u003c\/li\u003e\n\u003cli\u003eL: how long they last (years)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eEnrico Fermi asked \"Where is everybody?\" at Los Alamos around 1950 (as recalled; wording varies); Frank Drake introduced his equation at Green Bank in 1961.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e This is an open question. No value of N is known.\u003c\/p\u003e\u003ch3\u003eOn the shirt\u003c\/h3\u003e\u003cp\u003eFront: Fermia, the pixel-art character, with the title. Back: Fermi's question, the Drake equation with every factor named, the open-question note and the Los Alamos account. Printed on a unisex tee.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"S \/ White","offer_id":50936609898599,"sku":"81213926455482185838","price":29.99,"currency_code":"USD","in_stock":true},{"title":"S \/ Black","offer_id":50936609931367,"sku":"24254914709326729520","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ White","offer_id":50936609964135,"sku":"11771696905159274263","price":29.99,"currency_code":"USD","in_stock":true},{"title":"M \/ Black","offer_id":50936609996903,"sku":"15072850993477132992","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ White","offer_id":50936610029671,"sku":"27521320360395214203","price":29.99,"currency_code":"USD","in_stock":true},{"title":"L \/ Black","offer_id":50936610062439,"sku":"28252609231515273945","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ White","offer_id":50936610095207,"sku":"89236862418191981477","price":29.99,"currency_code":"USD","in_stock":true},{"title":"XL \/ Black","offer_id":50936610127975,"sku":"80811007825995258193","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ White","offer_id":50936610160743,"sku":"23682251799096911705","price":29.99,"currency_code":"USD","in_stock":true},{"title":"2XL \/ Black","offer_id":50936610193511,"sku":"23122694207952659247","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ White","offer_id":50936610226279,"sku":"19136351443794230069","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3XL \/ Black","offer_id":50936610259047,"sku":"18524695013689776654","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ White","offer_id":50936610291815,"sku":"31081500793514125699","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4XL \/ Black","offer_id":50936610324583,"sku":"28669258652488142495","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ White","offer_id":50936610357351,"sku":"18522640085394182968","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5XL \/ Black","offer_id":50936610390119,"sku":"28462949763686109345","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/fermi-paradox_front_16_white.png?v=1793595650","url":"https:\/\/pixelatedphysics.com\/ja\/products\/fermia-the-fermi-paradox-physics-t-shirt","provider":"Pixelated Physics","version":"1.0","type":"link"}