16/03/2017 Newsround

Hi, I'm Ayshah, this is Newsround live on CBBC, Coming up:

What do you do when you drop food on the floor?

Some fin-tastic news first up, a team of US Navy dolphins

are coming out of retirement to help scientists investigate why whales

Researchers from America think panicked whales dive away

from sonar and ship noises, causing them to drift off course

The super-clever dolphins are helping researchers

to understand why the sounds are so off putting.

If you love gadgets, you'll want to watch this.

We've been to have a look at some of the latest inventions

at the Wearable Technology Show in London.

And what it does is it translates sign language to text that is

displayed on the small screen, and speech that is

spoken out through this small speaker.

So as I sign, you're hearing what I'm saying

anybody that uses sign language as their primary use

of communication can wear it and be able to communicate

So, this is a toy and game, you use your mobile

phone or a tablet to bring them all to life using augmented reality.

There are three swappable blocks, head, body and legs.

But the really fun that we are trying to encourage

is this combination of play between the real object

This is a free to use mobile app that young surgeons who

are learning how to operate can use anywhere, any time.

And it allows them to practice on a fake patient,

And they could do it on mobile, but they can also do

So, with this, we can create interactive clothing, you can

You can draw anything you like and it lasts

for five to ten minutes before it fades away.

So it is kind of bringing the concept of Snapchat

The future of our technology will be in our homes very

soon and also we'll see it more and more when we are out and about.

If you're eating your breakfast now and you drop something on the floor,

Well, now scientists say that might be OK - if you're quick!

Have you ever picked up food from the floor and eaten it?

Well, I need to get some honest answers here.

So apparently some scientists are now

saying it might not be so bad for you.

It's the so-called five second rule, but hold up, there's loads of

things you need to think about before you start telling your

brother or sister to eat stuff from the floor.

If it's sticky or sweet, probably worth giving it a miss.

If it's pasta, biscuits or dried toast, then

Have you ever eaten anything off the floor before?

If you could clearly clean it off, and

it obviously weren't dirty anymore, then probably.

If I drop something, I wouldn't eat it.

But I still don't think it's really hygienic.

What would you say to those scientist who come up with

I would go like, yes, you need to take another year and that.

Mr scientist, I don't accept your five

And I don't accept your three second rule.

Go online to see how scientists missed millions of penguins off