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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Sunderland make Masuaku 10th signing of summer
Sunderland has signed former West Ham left-back Arthur Masuaku on a two-year contract as their 10th summer acquisition, following his departure from Besiktas. The 31-year-old DR Congo international, who made 128 appearances for West Ham, expressed his excitement about returning to the Premier League and aims to bring a winning mentality to the team as they prepare for their first season back in the league. Want More Context? 🔎
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