Pierre and Marie Curie are best known for their pioneering work in the study of radioactivity, which led to their discovery in 1898 of the elements radium and polonium.
1 The beam of your boat is the width at the widest part of the boat.  To measure the beam, stand inside the boat and run a measuring tape from the port (left) side to the starboard (right) side at the widest section of your boat.
rock the boat. 1. Lit. to do something to move a boat from side to side, causing it to rock. (Often in a negative sense.) Sit down and stop rocking the boat.