Researchers at the Italian Institute of Technology have developed a soft robotic arm inspired by an octopus. Its artificial suction cups contain sensors that can detect when they make contact with an object and estimate the direction and intensity of the force being applied. This allows the arm to grasp and manipulate objects autonomously, including in complex underwater environments where visibility may be poor.

Traditional robotic arms are usually rigid and can damage fragile objects if they grip too hard. An octopus-inspired arm could handle marine life, underwater equipment and irregular objects far more gently. It is a step toward robots that don't just see the world, but can physically feel it too.

Scientists using an autonomous underwater robot discovered an enormous breeding colony beneath Antarctica's Filchner Ice Shelf containing an estimated 60 million Antarctic icefish nests. The colony stretches across an area comparable to a major city, with the fish gathering around relatively warmer water to build and guard their nests. The discovery reveals an entire ecosystem hidden beneath the Antarctic ice that scientists previously had little access to.

This is a perfect example of how underwater technology is changing what we know about our own planet. A robot effectively revealed an entire hidden underwater city that humans could never have discovered so easily.

Military Submarines are advanced Naval Vessels designed to operate undetected beneath the surface of the ocean. There are mainly two types of Military Submarines:-

Mechanism of Submarines:
Submarines follow Archimedes' Principle. The concept is quite similar to Buoyancy. For instance, when the weight of a Submarine equals the water it displaces, it follows the Principle of Neutral Buoyancy, which means it maintains a steady depth underwater.

Sinking Mechanism:
To make a Submarine sink, the gravitational force must exceed the Buoyant Force.

Floating Mechanism:
On the other hand, The Buoyant force needs to be greater than the gravitational force.

These Mechanisms are only possible in Submarines because ballast tanks are used to fill with air to make the vessel float, whereas when the Submarine needs to descend, the tanks are flooded with water.

Submarine Movement:
Submarines rely solely on horizontal movement via a rudder at the end of the Submarine, allowing them to tilt accordingly. Backward and Forward motions are done using a propeller. Lastly, to navigate properly underwater, Sonar Technology is used. Sonar Technology primarily operates in sound. Submarines basically depend on sound because light cannot reach that depth and radio waves aren't effective underwater. Therefore, submarines use two types of Sonar Technology.

● Active Sonar: where the Submarine emits sound and detects reflected sound to determine its location.

● Passive Sonar: where the Submarine detects the sound of other Submarines.

Inner View of a Military Submarine:
Top Decks are outfitted with Torpedoes, which serve as weapons, while the Bottom Decks are mostly stored with Batteries to Supply Electricity around the Vessel. In the middle are the Motor Room and the Control Room. In most cases, a Conning Tower is located above the Control Room. This is because these towers serve as the Submarine's attack center. One of the key instruments on it is a Surveillance periscope, used to observe surrounding vessels. Most importantly, this Conning Tower served as the primary Entry and Exit point.

The Power Source of these Submarines mostly determines the type:

Conventional Submarine: A Submarine that is run by large Batteries that are rechargeable through Diesel Engines.

Nuclear Submarine: A Submarine powered by a Nuclear Reactor to generate electricity.

Outer View of a Military Submarine:
Military submarines are mostly layered with rubber on the outside. This is because they absorb sound very effectively; thus, they can remain undetectable underwater. Inside the rubber layer, the primary body of the submarine is called the hull. There are also two hull types: single-hull and double-hull. Single-hull submarines only have one layer of the main body, whereas double-hulled submarines have two layers of the main body. The advantage of a double hull is that it provides an additional layer of protection. It also has the benefit of withstanding the water pressure present underwater. Moreover, these hulls are made of strong steel alloys to withstand water pressure.

ERROR: ACCESS DENIED, the screen flashed in angry red text. Jake squinted his eyes. He immediately understood what he had to do. He opened the directory from under the table and opened the page with passwords. Jake typed each letter carefully; however, the screen froze. 

“What is happening?” I whispered. 

The system is fighting back. They have an active intrusion detection system. Someone just noticed the breach in the first try.

Suddenly, the overhead lights in the server room slammed on. A loud siren began to wail through the hallways. Jake cursed under his breath. Nova immediately pinged a code on his phone. 

Quick, Jake! 

He slammed his fingers onto the keys and hit Enter. The progress bar froze at 99%. For two agonizing seconds, nothing happened. Then, the entire monitor layout turned black. Across all twelve screens in the room, a single line of text appeared: SYSTEM ERADICATED. ALL OUTBOUND FILES PURGED.

The heavy footsteps of the guard reached the hallway just outside the door. Jake immediately shut down the computer and ran out of the room to the emergency stairs. 

“Can you bypass me through the emergency door?” Jake asked. 

Roger that. 

Jake slammed open the emergency door and rushed out through the rain. He was soaked by the time he reached his dorm. 

“Nova?” Jake called, but there was no reply, only static from the other end of the headphones. He sighed, pushed the wet jacket off, and sat down on his desk. He was exhausted, but he decided to type to his friends that he might not come to class tomorrow morning. Before that, he passed out. 

The next morning, there were headlines everywhere that the paper leaks were happening from the main campus itself- specifically from the Chairman's office. 

But behind those headlines, there was another headline. ‘A student from the campus was found dead in his dorm, wearing a pair of headphones, slumped on his desk.’

The last text he sent to one of his friends was, “A girl named Nova climbed to my dorm last night, her hair had neon pink streaks. Oh, she was wearing a pair of headphones…”

Thank you for reading the fifth issue of The Science Garage — where curiosity meets discovery and every page offers a new rabbit hole to explore.

I hope you enjoyed this issue where we took a deep dive into the mysteries of both advanced engineering and the uncharted depths of our oceans. In The News Garage, we looked at a mind-bending breakthrough: an Octopus-Inspired Robotic Arm that can actually "feel" what it grabs, bridging the gap between biological intuition and robotics. Then, we descended to the seafloor, where scientists have uncovered an astonishing underwater "city" housing over 60 million fish nests — a discovery that completely changes what we thought we knew about marine ecosystems.

In this issue, we also introduced a new element, Case Study: The Silent Killer of the Ocean, where we pulled back the curtain on military submarines, examining the dangerous technology which stays in the depths of the ocean and has the ability to cause ripples with its torpedoes on the other side of thr globe.

And for those who have been hanging on the edge of their seats, the wait is over. We finally brought the final chapter of Headphones — continuing the eerie mystery that left readers questioning everything they thought they heard.

As always, this publication would not have been possible without the dedication of our Editorial Team, Writers, and Contributors. Their brilliant minds and hard work continue to make The Science Garage the ultimate collision of learning and imagination.

Happy reading, and stay curious!