![Too much dust.
Too much dust.](https://content2.mcqstudy.com/ss/tbbt-12-9-00:07:24.226.jpeg)
Too much DUST.
The Big Bang Theory Season 12, Episode 9
![It's right off the dust jacket
of my mom's last book.
It's right off the dust jacket
of my mom's last book.](https://content2.mcqstudy.com/ss/tbbt-5-12-00:16:13.330.jpeg)
It's right off the DUST jacket
of my mom's last book.
The Big Bang Theory Season 5, Episode 12
![refine it into carbon dust,
refine it into carbon dust,](https://content2.mcqstudy.com/ss/tbbt-7-7-00:14:35.561.jpeg)
refine it into carbon DUST,
The Big Bang Theory Season 7, Episode 7
![...and bit the dust a week later.
...and bit the dust a week later.](https://content2.mcqstudy.com/ss/tbbt-4-23-00:09:07.719.jpeg)
...and bit the DUST a week later.
The Big Bang Theory Season 4, Episode 23
![It's the scientific word
for dust.
It's the scientific word
for dust.](https://content2.mcqstudy.com/ss/tbbt-12-14-00:08:46.161.jpeg)
It's the scientific word
for DUST.
The Big Bang Theory Season 12, Episode 14