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Curiosity Weekly

Roses Smell Different in Space

Curiosity Weekly

Warner Bros. Discovery

Science

4.6963 Ratings

🗓️ 20 May 2021

⏱️ 14 minutes

🧾️ Download transcript

Summary

Learn about emotions in online reviews; how flowers smell in space; and how water efficiency affected human evolution.

Emotions matter more than ratings when it comes to online reviews by Kelsey Donk

Roses Smell Different In Space—And You Can Smell Like Them Too by Ashley Hamer

Human bodies use up to 50% less water than our primate cousins, which may have helped us spread throughout the globe by Cameron Duke

  • Humans evolved to be the water-saving ape. (2021). EurekAlert! https://www.eurekalert.org/pub_releases/2021-03/du-het030221.php
  • Pontzer, H., Brown, M. H., Wood, B. M., Raichlen, D. A., Mabulla, Audax. Z. P., Harris, J. A., Dunsworth, H., Hare, B., Walker, K., Luke, A., Dugas, L. R., Schoeller, D., Plange-Rhule, J., Bovet, P., Forrester, T. E., Thompson, M. E., Shumaker, R. W., Rothman, J. M., Vogel, E., & Sulistyo, F. (2021). Evolution of water conservation in humans. Current Biology. https://doi.org/10.1016/j.cub.2021.02.045

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Find episode transcript here: https://curiosity-daily-4e53644e.simplecast.com/episodes/roses-smell-different-in-space


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Transcript

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0:00.0

Hi, you're about to get smarter in just a few minutes with Curiosity Daily from

0:05.0

Curiosity.com. I'm Cody Gough. And I'm Ashley Hamer. Today you learn about why

0:09.4

emotions matter more than ratings when it comes to online reviews, how flowers smell different in space,

0:16.0

and new research that suggests that how our bodies use water may have played a huge role in human evolution.

0:22.0

Let's satisfy some curiosity. have played a huge role in human evolution.

0:23.0

Let's satisfy some curiosity.

0:25.0

When you're trying to decide on a product to buy or a restaurant to visit,

0:30.0

customer ratings can be hard to trust.

0:33.4

If you see five stars on thousands of different products and dozens of different restaurants,

0:39.6

how do you choose between them?

0:41.4

New research has an answer.

0:43.0

Ignore the stars and look for the emotion.

0:48.0

To solve this conundrum, a group of researchers from Northwestern and University of Massachusetts, Boston designed four studies to analyze

0:55.6

years of consumer reviews of movies, books, restaurants, and commercials, and compare those reviews to the subject's actual success.

1:05.0

They found what we all kind of expected.

1:08.0

Star ratings are over-inflated.

1:11.0

The average Amazon rating is 4.2 out of 5 stars. They found a similar trend on

1:17.4

Yelp and other research has found the same on Uber. All of those positive reviews can't be honest. The researchers call

1:26.2

this the positivity problem. Most reviews are positive and not actually that trustworthy.

1:33.0

So unsurprisingly, their analysis found that high ratings were a weak indicator of success.

1:39.0

That was true whether they were looking at 13 years of movie reviews, 20 years of book reviews, or two

1:46.0

seasons of football championship commercials.

...

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