Puzzle 4

Fastening device invented by both Hunt and Rowley.

Female dancer who performs arabesques, pirouettes.

Harry Potter spell used to unlock doors.

Illegal occupants of vacant properties.

Individual fluffy loaf for a sandwich.

Male leader of a family.

Nickname for Mars.

Science linked to Amedeo Avogadro and Marie Curie.

Science studied by Amedeo Avogadro and Niels Bohr.

Subtropical Florida wetland.

The long mouth of an animal like a snout or trunk.

The main recording studio of The Beatles.