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Science Quickly

Animals Can Be Given False Memories

Science Quickly

Scientific American

Science

4.31.4K Ratings

🗓️ 9 March 2015

⏱️ 2 minutes

🧾️ Download transcript

Summary

Two studies, one with bees and one with mice, show that the brain can be manipulated into having a memory of an occurrence that did not in reality happen. Karen Hopkin reports

Transcript

Click on a timestamp to play from that location

0:00.0

This is scientific Americans 60 second science. I'm Karen Hopkins. This will just take a minute.

0:07.6

Have you ever sworn that you left your phone in the car only to find it in your pocket or on your desk or admit it in the fridge or

0:15.3

maybe you just dream that you left it on the dashboard and the memory was so real

0:18.8

you had to check there first. Well it happens to the best of us.

0:23.0

And if you believe the latest research, it can happen to animals too.

0:26.0

Okay, critics don't misplace their electronic devices, but researchers are finding that memory can be as tricky for some

0:31.7

beasties as it is for us.

0:33.0

Take for example bees.

0:35.0

These flying foragers are renowned for their ability to remember

0:38.0

which flowers are best and where to find them.

0:40.0

But it turns out bees can be buloxed.

0:43.0

Scientists train bumblebees to expect a droplet of sugar water from two artificial flowers,

0:48.0

one that was solid yellow, the other looking like an archery target of black and white rings.

0:52.0

A few minutes later, the insects were allowed

0:54.4

to choose between those two flowers and a third one that had yellow rings, a combo of the previous

0:59.2

patterns. In this short term test, the bees correctly showed a preference for the petals they'd seen had the sweet stuff.

1:05.0

But when challenged a few days later, the bees got bamboozled.

1:09.0

They began selecting the yellow-ringed flower, even though it had never given them anything.

1:13.7

It was like their memories had merged, or so conclude the authors in their paper in the journal

1:17.9

Current Biology.

1:19.7

Meanwhile, another team of researchers found they could manipulate the memories of mice while the animals slept.

1:25.0

As rodent skitter from here to there, what are called place cells in their brains record their pathways and locations.

...

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