| https://static.adsafeprotected.com/main.19.8.619.js | 269.79 |
| https://pagead2.googlesyndication.com/pagead/managed/js/activeview/current/ufs_web_display.js?cache=r20110914 | 221.47 |
| https://static.adsafeprotected.com/sca.17.6.4.js | 91.43 |
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| https://www.googletagservices.com/dcm/impl_v106.js | 68.78 |
| https://fw.adsafeprotected.com/rjss/st/2627594/89619295/skeleton.js?bidurl=www.britannica.com%252fscience%252fdensity-current | 62.33 |
| https://ep1.adtrafficquality.google/bg/hxE3TQCkXuxt7r_bWu7AoTGmvmaS4CIx1WF2US_DCj0.js | 52.50 |
| https://ep2.adtrafficquality.google/sodar/VFc2VJAc.js | 42.74 |
| https://s0.2mdn.net/simgad/9263117178957294831 | 33.90 |
| https://choices.truste.com/ca?pid=tradedesk01&aid=tradedesk01&cid=vux9ko2_y1mr1qq_c2q7j5z8&c=tradedesk01cont1&js=pmw0&w=300&h=250&sid=0&dsarequired=&dsabehalf=&dsapaid=&dsaparams= | 21.19 |