Puzzle 4

A chicken's leg on a barbecue.

Book of streets and motorway maps.

Britney Spears’ 2008 hit song.

Country uncovering the first known animal drawings.

Going uphill.

Leonardo da Vinci/__ , Roman international airport.

Malala __, 17 when she got the Nobel Peace Prize.

More vague, rougher.

Often marbled pages at front and back of a book.

Research done outside the laboratory.

Secure storage facility for valuables.

State of being tired.