1.   Boil the syrup hard until bubbles become big and shiny, and caramel turns a medium golden brown.

2.   This was vital because when the system is pressurized, any missed bubbles become dissolved oxygen when the system is pressurized, and oxygen causes rust.

3.   In the low gravity, the surface tension on air bubbles became so strong that the tadpoles could not punch through to breath, she said.

4.   In the low gravity, the surface tension on air bubbles became so strong that the tadpoles could not punch through to breathe, she said.