Benton, Brunel with Brunel Deck in action on scientificamerican.com

Under the hood

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.header-2 { font-family: Benton, Helvetica, Arial, sans-serif; font-size: 14px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 20px; text-transform: none; color: #999999; }
.header-3 { font-family: Brunel-Deck-Semibold, Georgia, serif; font-size: 60px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 65px; text-transform: none; color: #1A1A1A; }
.header-4 { font-family: Brunel-Text-Medium, Georgia, serif; font-size: 24px; font-style: italic; font-weight: normal; letter-spacing: normal; line-height: 30px; text-transform: none; color: #323232; }