Yeah, they are on AmasonS3; I have just tested it myself: curl -vI mars.nasa.gov * Rebuilt URL to: mars.nasa.gov/ * Trying 52.222.171.112... * Con

Yeah, they are on AmasonS3; I have just tested it myself: curl -vI mars.nasa.gov * Rebuilt URL to: mars.nasa.gov/ * Trying 52.222.171.112... * Connected to mars.nasa.gov (52.222.171.112) port 80 (#0) > HEAD / HTTP/1.1 > Host: mars.nasa.gov > User-Agent: curl/7.50.1 > Accept: */* > < HTTP/1.1 200 OK HTTP/1.1 200 OK < Content-Type: text/html Content-Type: text/html < Content-Length: 93833 Content-Length: 93833 < Connection: keep-alive Connection: keep-alive < Date: Sun, 04 Dec 2016 18:45:05 GMT Date: Sun, 04 Dec 2016 18:45:05 GMT < Cache-Control: max-age=60 Cache-Control: max-age=60 < Last-Modified: Sun, 04 Dec 2016 18:44:07 GMT Last-Modified: Sun, 04 Dec 2016 18:44:07 GMT < ETag: "e21cacedb2a8c984fac76d84cd8549a7" ETag: "e21cacedb2a8c984fac76d84cd8549a7" < Server: AmazonS3 Server: AmazonS3 < X-Cache: Miss from cloudfront X-Cache: Miss from cloudfront < Via: 1.1 09a9032b8291da9155abd9dd1a5a360e.cloudfront.net (CloudFront) Via: 1.1 09a9032b8291da9155abd9dd1a5a360e.cloudfront.net (CloudFront) < X-Amz-Cf-Id: yVDCFvz6IzsBDzJIbzL8fA7fG2MVIyydpNKP1Kkk1mr6Oh0dqYIVKQ== X-Amz-Cf-Id: yVDCFvz6IzsBDzJIbzL8fA7fG2MVIyydpNKP1Kkk1mr6Oh0dqYIVKQ== < * Connection #0 to host mars.nasa.gov left intact