"Bon... Qu'est-ce que c'est..."
Harpalos just had the notification that he received a communication. It was from ZaneZavin, someone he always trusted and knew as a very curious person, just like him. He hadn't news of him since a long time so with pleasure he switched his monitor from his latest reading to the message.
"Hum..."
Caillech came by and saw him scratching his chin. She sat next to him, asking what was troubling him.
"Oh! Nothing, don't worry. No one is between life and death and requiring our immediate assistance. No, check this, it's from Zane."
She checked the screen, trying to figure out what was that. It looked like a puzzle, but with really few details. She pointed at the screen to a number.
"What is that? Is that the only clue we have?"
"250Ghz. I haven't heard this since a long time. Let me explain you. Radio transmissions are made using the electromagnetic waves. There are waves like that everywhere, including light itself. We don't see it, but there are billions of electrons dancing in constant oscillation everywhere. This oscillation is made at a certain speed. We call this the frequency. The higher the frequency, the faster the electrons move. The hertz is the unit of measure of frequency. 250 GigaHertz mean 109 hertz. At such an high level, we call that high frequency. Frequencies so high that they are strong enough to travel really far without having the signal lose too much of its strength. They are used in radio transmissions mostly. And that's what I think Zane wants us to check onto."
Caillech was used to Harpalos' usual lectures on various topics. She didn't understand everything despite his efforts in vulgarizing the topic, but anyway, she saw as usual in his eyes that he loved sharing knowledge.
"Well, can we set the ship to listen at this frequency then?"
"Normally, yes. As you know, the avoid the agitation that followed the start of the war between Zion and the Machines, I opted for our safety so we moved to the North Pole. We're safe here. However, radio transmissions can hardly reach here, even in high frequency. I have to explain you how it work for you to understand."
He opened a drawing program and started explaining. Caillech couldn't prevent herself from giggling, seeing how bad his drawing was. Harpalos knew well enough that he was bad with arts, so he didn't mind.

"You see, normally the radio waves sent by an antenna on high frequency will go up in the sky until they bounce in the sky, usually on the ionosphere which is the last part of the atmosphere. But you see, one day humans woke up and decided that they would add a cloud of smoke all around the Earth, blocking the sun. They thought that would kill the Machines. The rest is history. Anyway. Now thanks to that stuff, high frequencies can't travel correctly. I tried it and I could only receive a very partial signal. So well, we have two choices. Either we get closer to the source and try to pick up a clearer signal, or we stay here in safety."
"Well, some hotter air wouldn't do us any wrong!"
She knew that Harpalos would never pass on the opportunity to discover new things. A few minutes later, La Crypte took off and started moving southward.
Harpalos just had the notification that he received a communication. It was from ZaneZavin, someone he always trusted and knew as a very curious person, just like him. He hadn't news of him since a long time so with pleasure he switched his monitor from his latest reading to the message.
"Hum..."
Caillech came by and saw him scratching his chin. She sat next to him, asking what was troubling him.
"Oh! Nothing, don't worry. No one is between life and death and requiring our immediate assistance. No, check this, it's from Zane."
She checked the screen, trying to figure out what was that. It looked like a puzzle, but with really few details. She pointed at the screen to a number.
"What is that? Is that the only clue we have?"
"250Ghz. I haven't heard this since a long time. Let me explain you. Radio transmissions are made using the electromagnetic waves. There are waves like that everywhere, including light itself. We don't see it, but there are billions of electrons dancing in constant oscillation everywhere. This oscillation is made at a certain speed. We call this the frequency. The higher the frequency, the faster the electrons move. The hertz is the unit of measure of frequency. 250 GigaHertz mean 109 hertz. At such an high level, we call that high frequency. Frequencies so high that they are strong enough to travel really far without having the signal lose too much of its strength. They are used in radio transmissions mostly. And that's what I think Zane wants us to check onto."
Caillech was used to Harpalos' usual lectures on various topics. She didn't understand everything despite his efforts in vulgarizing the topic, but anyway, she saw as usual in his eyes that he loved sharing knowledge.
"Well, can we set the ship to listen at this frequency then?"
"Normally, yes. As you know, the avoid the agitation that followed the start of the war between Zion and the Machines, I opted for our safety so we moved to the North Pole. We're safe here. However, radio transmissions can hardly reach here, even in high frequency. I have to explain you how it work for you to understand."
He opened a drawing program and started explaining. Caillech couldn't prevent herself from giggling, seeing how bad his drawing was. Harpalos knew well enough that he was bad with arts, so he didn't mind.

"You see, normally the radio waves sent by an antenna on high frequency will go up in the sky until they bounce in the sky, usually on the ionosphere which is the last part of the atmosphere. But you see, one day humans woke up and decided that they would add a cloud of smoke all around the Earth, blocking the sun. They thought that would kill the Machines. The rest is history. Anyway. Now thanks to that stuff, high frequencies can't travel correctly. I tried it and I could only receive a very partial signal. So well, we have two choices. Either we get closer to the source and try to pick up a clearer signal, or we stay here in safety."
"Well, some hotter air wouldn't do us any wrong!"
She knew that Harpalos would never pass on the opportunity to discover new things. A few minutes later, La Crypte took off and started moving southward.
