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This week’s new questions

Why do cats wash themselves a lot, while dogs don’t? And if 21st-century babies wean on a globalised diet that has only recently been available to them, what did babies wean on in prehistoric times?

Bengal cat washing itself on bed; Shutterstock ID 1123136123; purchase_order: -; job: -; client: -; other: -

Why do cats wash themselves, while dogs don’t?

Richard Grimmer,

Trowbridge, Wiltshire, UK

Portrait of mother and baby sitting at the table, and feeding her with food and fruit. close up. The concept of feeding and weaning baby from the breast. Hispanic family; Shutterstock ID 2260034413; purchase_order: -; job: -; client: -; other: -

If 21st-century babies are weaned on a globalised diet that has only recently been available, what was used to wean babies in prehistoric times?

Ian, Naraa and baby Vaughan Allardyce,

London, UK

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