Worms do have something in their mouth that they can poke out, like a tongue. It is called a stylet.
Flickr/DJ SINGH
The short answer is no. But worms can use different parts of their body to do some of the jobs that our tongues do - like tasting and crushing food.
Here’s a modern human skull on the left, and Neanderthal skull on the right.
Darren Curnoe
Maeve, age 8, has a question that has stumped many scientists over the years. And that’s because it’s a surprisingly tricky question to answer. It depends a bit on what you mean by ‘person’.
It’s all about evolution.
Flickr/myri_bonnie
Animals that evolved in cold parts of the world usually have lighter skin. If a light-skinned animal has blood vessels close to the surface of their ear skin, this will make the ears look pink.
Flight Engineer Peggy Whitson suits up ahead of a spacewalk. Vomiting inside a spacesuit during a spacewalk could be fatal for astronauts.
NASA
The students of class 3E, Ferny Grove State School, want to know if astronauts get space sick when travelling to the International Space Station.
Without satellites, modern technologies such mobiles phones and GPS would not exist.
Flickr/NASA Goddard Space Flight Center
We’ve all seen videos of satellites being blasted off into space - but once they’re locked in orbit around the earth, how do we bring them back down?
Allergies may be in the genes that are passed down from parents to children.
Flickr/U.S. Department of Agriculture
Younus, age 9, wants to know how people become allergic to food.
The things you see your cat doing are probably what it enjoys.
Flickr/Jennifer Williams
When humans are happy, they may smile, or laugh, or dance - but what do animals do? Melissa, age 12, wants to know how she can tell if her cat is happy and likes you.
The mass of the Earth is big enough that the gravitational force it creates can pull the hard shape of ice, rock and metal into a sphere.
NASA Earth Observatory images by Joshua Stevens, using Suomi NPP VIIRS data from Miguel Román, NASA's Goddard Space Flight Center
Imagine the Earth pulling everything it is made up of, all of its mass, towards its centre. This happens evenly all over the Earth, causing it to take on a round shape.
Scientists usually use the word “venomous” rather than “poisonous” when they’re talking about snakes.
Flickr/Sirenz Lorraine
If one venomous snake bites a mouse and injects venom into it, you can then feed that same dead mouse to another snake. The second snake won’t die.
When looking out of a train window, things close by seem to move past faster than things that are far away.
Flickr/Larry W. Lo
Ada, 7, wants to know why things close to the train windows zoom by really fast, while things further away seem to go by much slower.
Bees usually get nectar from flowers, but sometimes they steal it from the nests of other bees.
Flickr/Michael Cheng
Bees sting other animals, including humans, when they think there might be a threat to their hive. But Evie, age 8, wonders if bees ever accidentally sting other bees.
Dreams are like a forest walkway: there’s no clear sense of direction and you can easily get lost.
ollierb/flickr
Niamh, age 7, wants to know why we have scary dreams. But after 200 years of study, dreams are still very much a mystery.
Lasers being shone from the European Southern Observatory’s Very Large Telescope in Chile.
These lasers help remove the twinkles in the night sky and help astronomers see stars clearer on Earth than ever before.
F. Kamphues/ESO
How exactly do the stars twinkle in the night sky? As it turns out, the answer is full of hot air… and cold air.
Rainbows get their round shape from a process called reflection.
Flickr/Luigi Mengato
Georgina, age 5, wants to know why rainbows are round.
What’s better – breathing through your nose or your mouth?
Flickr/Lauren Rushing
Breathing in through your nose has many medical benefits over mouth breathing. As usual, be wary of misinformation and bias when looking up health on the internet.
Big sewer pipes take all sewage to a place where it is treated. This place is called a sewage treatment plant.
Flickr/Dean Hochman
You flush the toilet. Down it goes. What happens after that? Clancy, age four, wants to know.
Nature gave us ten fingers, so it makes sense to count to ten. But what happens when we run out of fingers?
Flickr/Bethan
Why are there 60 minutes in an hour, and not 10? Why do we count up to 10, anyway? Quentin, age five, wants to know.
While Mercury is indeed very hot, it is not hot enough to melt.
NASA/JPL-Caltech
The planets closer to the Sun are indeed hotter than the Earth is. But they are still not hot enough to melt the rocks they are made from.
Sssssssnakes and humansssssss make an ssssss noissssse in two totally different waysssssssss.
Flickr/JanetandPhil
The way humans make an ‘ssss’ noise is different to the way a snake does it. We put our tongue behind our teeth when we hiss, but for a snake the tongue isn’t involved at all in making sounds.
The Sun is currently middle-aged, having celebrated its 4,568,000,000th birthday at some point in the last million years.
Flickr/ChopWood CarryWater
In five or seven billion years time, the Sun’s life will come to an end. And it will be really spectacular - if you’re watching from far enough away.