Speedy swimsuit for modern penguins

摘要

Penguins donned their black-and-white suits late in their evolution -and may have become faster swimmers when they did.rnThe finding comes from inspection of a 36-million-year-old fossil discovered in Peru and dubbed Inkayacu paracasensis. At 1.5 metres tall and weighing 55 to 60 kilograms, it is among the largest specimens in the penguin lineage.