If you are not sure if the website you want to visit is safe, you can check it out here. Enter the address (url) of the website and see the invisible elements, such as a header or meta data.
site address:www.sciencemag.org/sites/all/themes/science/images/logo-science.sv...
site title:
Url ContentScalable Vector Graphics (SVG)
MIME Type / Internet Media Typeimage/svg+xml
MIME Type image
File Extension.svg
More Details (link to:)Wikipedia: SVG
Powered by: Very Tiny URL Shortener at https://vturl.net VeryTinyURL

Header

HTTP/1.1 200 OK
Accept-Ranges bytes
Cache-Control max-age=1209600
Content-Type image/svg+xml
Date Thu, 24 May 2018 08:03:26 GMT
ETag df2-5599f93821040
Expires Thu, 31 May 2018 13:47:50 GMT
Last-Modified Wed, 20 Sep 2017 14:13:13 GMT
Server Apache
Via 1.1 varnish
X-Age 584136
X-Cache HIT
X-Content-Type-Options nosniff
X-Varnish 624553178 592652041
Content-Length 3570
Connection keep-alive

Load Info

page size3570
load time (s)0.204157
redirect count0
speed download0
server IP52.52.151.131


* all occurrences of the string "http://" have been changed to "htt???/"