Evidence suggests dinosaurs had lips


A Tyrannosaurus rex is not quite as scary when you picture it with lips — but new research out of the University of Toronto suggests we ought to be doing just that. According to the new study, "beast-footed" terrestrial carnivores had lips and gums that covered their teeth, contrary to how we depict them now:
(A dentally incorrect T-Rex, courtesy iStock)
"In popular culture, we imagine dinosaurs as more ferocious-looking, but that is not the case," vertebrate paleontologist Robert Reisz said in his findings.
Subscribe to The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.

Sign up for The Week's Free Newsletters
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
The support for the argument comes from looking at tooth enamel, which dries out when it isn't kept hydrated by lips. While modern day reptiles like crocodiles have the kind of exposed teeth we tend to imagine on dinosaurs, crocodiles spend most of their day in the water, which helps keep the enamel hydrated. Dinosaurs, however, were mostly terrestrial.
The study concluded that the teeth "were not exposed permanently, but covered by reptilian lips," like those on some lizards.
Sign up for Today's Best Articles in your inbox
A free daily email with the biggest news stories of the day – and the best features from TheWeek.com
Jeva Lange was the executive editor at TheWeek.com. She formerly served as The Week's deputy editor and culture critic. She is also a contributor to Screen Slate, and her writing has appeared in The New York Daily News, The Awl, Vice, and Gothamist, among other publications. Jeva lives in New York City. Follow her on Twitter.
-
Today's political cartoons - March 30, 2025
Cartoons Sunday's cartoons - strawberry fields forever, secret files, and more
By The Week US Published
-
5 hilariously sparse cartoons about further DOGE cuts
Cartoons Artists take on free audits, report cards, and more
By The Week US Published
-
Following the Tea Horse Road in China
The Week Recommends This network of roads and trails served as vital trading routes
By The Week UK Published
-
'Like a sound from hell': Serbia and sonic weapons
The Explainer Half a million people sign petition alleging Serbian police used an illegal 'sound cannon' to disrupt anti-government protests
By Abby Wilson Published
-
Israel detains director after West Bank settler clash
speed read The director of Oscar-winning documentary 'No Other Land' was arrested and beaten
By Rafi Schwartz, The Week US Published
-
Turkey arrests Istanbul mayor, a top Erdogan rival
Speed Read Protests erupted in Turkey after authorities detained Istanbul Mayor Ekrem Imamoglu
By Peter Weber, The Week US Published
-
Israel strikes Gaza, breaking ceasefire
Speed Read 326 Palestinians were killed in the first major attack since Netanyahu's government signed a ceasefire agreement with Hamas
By Peter Weber, The Week US Published
-
The arrest of the Philippines' former president leaves the country's drug war in disarray
In the Spotlight Rodrigo Duterte was arrested by the ICC earlier this month
By Justin Klawans, The Week US Published
-
Houthis vow retaliation amid US airstrikes
Speed Read Trump promises the US will use 'overwhelming lethal force' against the Houthis until they stop attacking Red Sea ships
By Peter Weber, The Week US Published
-
Pakistan train hostage standoff ends in bloodshed
Speed Read Pakistan's military stormed a train hijacked by separatist militants, killing 33 attackers and rescuing hundreds of hostages
By Peter Weber, The Week US Published
-
Ukrainian election: who could replace Zelenskyy?
The Explainer Donald Trump's 'dictator' jibe raises pressure on Ukraine to the polls while the country is under martial law
By Sorcha Bradley, The Week UK Published