A Kilogram Is Now a Kilogram—Forever | SciShow News

The video discusses the redefinition of the kilogram, which was previously based on a physical object known as Le Grande K. Scientists have now tied the kilogram to Plank's constant, ensuring a stable and universal standard. This change was made possible by the kibble balance, a device that measures mass in terms of energy. The video also explores a study on the genetic basis of taste sensitivity, particularly bitterness, and its impact on coffee consumption. The study found that people more sensitive to caffeine's bitterness tend to drink more coffee, suggesting a complex interplay between genetics, taste, and behavior.

According to the research, how is sensitivity to caffeine's bitterness related to coffee consumption?

What did the researchers find about the relationship between genetic variants and the consumption of bitter drinks?

How do the findings about caffeine sensitivity challenge previous assumptions about taste preferences?