Some frogs have teeth on their upper jaws and mouths, with one species having both upper and lower sets, while others are toothless. Frogs have lost and regained teeth over 20 times in their evolution, more than any other vertebrates, likely due to their diet of small invertebrates. This phenomenon of losing and regaining traits goes against evolutionary rules, such as Dollo’s Law of Irreversibility, seen in other species like limpets and lizards.
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To C5, or not to C5? That is the question for F1 Canadian GP qualifying
With the introduction of the C6 compound for 2025, Formula 1 teams face uncertainty over tyre choices for qualifying at the Canadian Grand Prix, as Pirelli has adopted a more aggressive approach to tyre selection. The softest rubber, anticipated to provide significant performance benefits, raises questions among drivers about the optimal compound for race conditions in Montreal. More Context
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