It’s time to take a splash in the sea with five fun and fascinating fast facts about marine mammals, an interview with Dr Vanessa Pirotta, a wildlife scientist who knows a lot about whales, and there’s a warm-blooded blubber activity for you to try yourself at home.

Presented by Jenny Lynch and Matilda Sercombe. Written and produced by Jenny Lynch. Music by Purple Planet Music. Sound effects by Pixabay.

Creative Science: https://www.creativescience.com.au

Facebook: @creativescienceaustralia

Instagram: @creative_science_australia

Episode content:

00:00 Introduction and fast facts

03:49 Dugongs and manatees

04:31 Interview with Dr Vanessa Pirotta

11:06 Blubber fingers activity

Dr Vanessa Pirotta: https://www.vanessapirotta.com/

Books by Dr Vanessa Pirotta: ‘The Voyage of Whale and Calf’, ‘Oceans at Night’, ‘Humpback Highway’

Blubber fingers activity instructions:

Marine mammals have lots of special adaptations to help them survive in the sea. One of these adaptations is whale blubber, which is a layer of fat that keeps warm-blooded whales warm in cold ocean water.

You will need: a bowl, cold water from the fridge, ice cubes, two disposable gloves, a spoon, and some soft butter or margarine. If you don’t have any disposable gloves, try using two small plastic bags instead.

This activity is pretty messy, so do it next to a sink, with soap and warm water ready for washing your hands at the end.

1. Fill the bowl with cold water and add some ice cubes to the water to make it really cold.
2. Scoop 2 big spoonfuls of soft butter or margarine into one of the disposable gloves and squeeze the butter or margarine down into the fingers of the glove, pushing any air bubbles out of the fingers.
3. Put the other glove on one of your hands first.
4. Put the glove filled with butter or margarine on your other hand and make sure your fingers are covered with the butter or margarine.
5. Carefully place the fingers of both of your hands into the ice-cold water. Try to keep your fingers in the water for at least 2-minutes, but take them out of the water if they feel too cold. What do you notice?

Your buttery fingers should last longer in the water because the butter is protecting your fingers from the icy cold water. Heat energy always moves from a warm object to a colder object and the butter is acting as an ‘insulator’ because it slows down the movement of heat energy out of your fingers.

A lot of cold-climate animals have blubber. Seals, whales, and polar bears, all have a layer of blubber to stop them losing too much heat from their bodies.

Let’s get immersed in a high-tech virtual world with five fascinating fast facts about virtual reality, an interview with Dr Vanessa Moss, an astrophysicist who uses virtual reality to collaborate with other scientists, and an eye-opening binocular activity for you to try yourself at home.

Presented by Jenny Lynch and Matilda Sercombe. Written and produced by Jenny Lynch. Music by Purple Planet Music. Sound effects by Pixabay.

Creative Science: https://www.creativescience.com.au

Facebook: @creativescienceaustralia

Instagram: @creative_science_australia

Episode content:

00:00 Introduction and fast facts

04:05 Interview with Dr Vanessa Moss

10:33 Dominant eye activity

Virtual science exhibition, The Future of Meetings TFOMxCSIRO Exhibition Hall

NOTE: This virtual space uses quite a lot of data (100MB). The space is compatible with Safari, Chrome and Edge browsers (partial support for Firefox). It is also accessible via the Spatial.io phone app or Oculus Quest 2 (VR).

https://www.spatial.io/s/TFOMxCSIRO-Exhibition-Hall-64a1609a2e4f7d91d95a43bd?share=9027864886891104356

Dominant eye activity instructions:

The hand you use for writing is your ‘dominant hand’ and most of us are either left-hand dominant or right-hand dominant. A few people are ambidextrous, which means they can use one hand just as easily as the other.

Did you know that you probably have a dominant eye as well as a dominant hand?

Follow these steps to test which is your dominant eye.

1. Stretch your arms out in front of you and use your fingers and thumbs to make a triangle shape that you can see through.
2. Focus on an object in the distance and keep staring at it.
3. Keep your arms stretched out, but slide your hands together to make the triangle smaller, while still looking at the distant object.
4. Keep looking at the object, and close one of your eyes.

If you can still see the object, the eye that is still open is your dominant eye.

If you can’t close one eye at a time by winking, try asking someone to help you by carefully covering one of your eyes with their hand.

1. If you can’t see the object, switch eyes, so the other eye is closed.

If you can now see the object with your open eye, then this is your dominant eye.

If it didn’t work, try again, or maybe you are one of the few people who does not have a dominant eye.

As well as testing for your dominant eye, this activity demonstrates how each of your eyes sees a slightly different picture of your surroundings. Virtual reality relies on this binocular vision to create realistic images of three-dimensional worlds.

Get ready to launch into fascinating fast facts about space junk, an interview with Mars Buttfield-Addison, a computer scientist and science communicator who knows a lot about space debris, and an easy orbital activity for you to try yourself at home.

Presented by Jenny Lynch and Matilda Sercombe. Written and produced by Jenny Lynch. Music by Purple Planet Music. Sound effects by Pixabay.

Creative Science: https://www.creativescience.com.au

Facebook: @creativescienceaustralia

Instagram: @creative_science_australia

Episode content:

00:00 Introduction and fast facts

03:28 A big collision in space

04:10 Interview with Mars Buttfield-Addison

10:49 Orbiting sock activity

Orbiting sock activity instructions:

You will need: a pair of long socks, for example, knee-high socks or football socks,

or ask if you can borrow a pair of adult-sized socks.

1. Roll up one of the socks and push it down into the other sock, so it is in the toe end of the sock.
2. Make sure you have plenty of space around you before doing this step. Hold the open end of the sock and swing the sock around in a circle, so the rolled-up sock is orbiting your hand. Make the sock swing around in a circle as fast as you can, and then slow down the speed until the sock only just stays in a nice, round circle-shaped orbit.
3. Hold the sock about halfway along the length, so the orbit is smaller. Swing the sock around again so it orbits your hand in a smaller circle. Make it swing around as fast as you can again, and then slow down the speed while keeping it in a circle-shaped orbit.

What do you notice about the speed of the larger orbit compared to the smaller orbit?

The sock can orbit a lot slower in the larger orbit compared to the smaller orbit.

This is only a model made from socks, so the forces are a bit different compared to a real satellite orbiting Earth. In our sock model, the long sock is providing the force to keep the rolled-up sock in its orbit, so the long sock is a bit like gravity holding a satellite in orbit.

A satellite is held in orbit by the force of gravity. For lower orbits, the force of gravity is stronger and a satellite in a lower orbit has to move faster to avoid falling down to Earth. Higher orbit satellites experience less gravitational pull, and they move more slowly to stay in orbit.