# What has completely disappeared from planet earth

**URL:** <https://boards.straightdope.com/t/what-has-completely-disappeared-from-planet-earth/845899>\
**Category:** Factual Questions\
**Created:** [January 3, 2020, 8:44pm UTC](https://boards.straightdope.com/t/what-has-completely-disappeared-from-planet-earth/845899 "2020-01-03T20:44:05Z")\
**Posts on this page:** 3\
**Page:** 4

<div class="post-metadata">

**Author:** ![Banksiaman](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/banksiaman/32/3334_2.png) [@Banksiaman](https://boards.straightdope.com/u/Banksiaman)\
**Post date:** [January 9, 2020, 12:50pm UTC](https://boards.straightdope.com/t/what-has-completely-disappeared-from-planet-earth/845899/61 "2020-01-09T12:50:56Z")

</div>

The barman says to the [Paranthropus](http://humanorigins.si.edu/evidence/human-fossils/species/paranthropus-boisei)’Why the long face?’ .

thank you, thank you, I’m here all Pleistocene.

---

<div class="post-metadata">

**Author:** ![Gymnopithys](https://avatars.discourse-cdn.com/v4/letter/g/fbc32d/32.png) [@Gymnopithys](https://boards.straightdope.com/u/Gymnopithys)\
**Post date:** [January 9, 2020, 8:56pm UTC](https://boards.straightdope.com/t/what-has-completely-disappeared-from-planet-earth/845899/62 "2020-01-09T20:56:14Z")

</div>

> [@Mangetout](#):
>
> What would fit in the ‘animate’ category but not be an organism?

Clouds ?

---

<div class="post-metadata">

**Author:** ![Senegoid](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/senegoid/32/6606_2.png) [@Senegoid](https://boards.straightdope.com/u/Senegoid)\
**Post date:** [January 9, 2020, 9:32pm UTC](https://boards.straightdope.com/t/what-has-completely-disappeared-from-planet-earth/845899/63 "2020-01-09T21:32:46Z")

</div>

> [@beowulff](#):
>
> Just for fun, I calculated how much plutonium would be present in a battleship-sized (60,000 ton) mass of Pitchblende, and came up with .02 ounces, or around the mass of a postage stamp.

A more relevant unit-of-measure for an amount of plutonium would be the number of people you could poison with that amount.

How many people could you poison with .02 ounces of plutonium? I’m guessing quite a lot.

[Previous page](https://boards.straightdope.com/t/what-has-completely-disappeared-from-planet-earth/845899.md?page=3)