to the bottom

Salt is heavier, or more dense, than water, and sinks to the bottom.

This experiment gets to the bottom of the mystery of colorful candy-coating.

However, a former director of a baby formula manufacturer, who wished to remain anonymous, told the BBC the introduction of an NHS-branded product would create a “race to the bottom”, with companies lowering the quality of their formula to compete for the cheapest price.

Fixing LED strip lights to the bottom of surfboards could deter attacks by great white sharks, Australian scientists say.

"The issue surrounding her death was very suspicious to me. I still haven't got to the bottom of it," said Rachael.