Because walls exist that can be hollow enough to hear through, or some can just hear around a corner; because technology exist to hide devices made for listening; because people exist whereas someone listening can get lost in the crowd; and because people aren't always aware of their surroundings, so the one eavesdropping can slip away unseen.
It is possible to eavesdrop without being seen because there are various methods of surveillance and communication interception that do not require physical visibility. These methods include wiretapping phone lines, utilizing hidden cameras or microphones, and hacking into electronic devices or networks. Additionally, advancements in technology have also made it easier for eavesdroppers to remotely monitor conversations or data without being physically present.
Consider the origin of the word "eavesdrop" - it relates to the "eaves" of a house. A person wanting to overhear what was being said in a house (a spy) would conceal themselves in the "eaves" to listen.
Will proper staining and the right organism the nucleus of a cell can be seen without an electron microscope.
Yes. Even on slightly cloudy nights it is possible to see Jupiter with the naked eye.At the moment, Jupiter can be seen to the SW of the Moon and is clearly visible without binoculars.
No, it cannot.
Yes.
Consider the origin of the word "eavesdrop" - it relates to the "eaves" of a house. A person wanting to overhear what was being said in a house (a spy) would conceal themselves in the "eaves" to listen.
Be a Ninja
It is possible, yes. This however, is a difficult proposition as most of the US-Mexico border is heavily monitored, or crosses dangerous areas -- such as the Sonoran and Chihuahun deserts.
In the Aeneid: Book I, Venus conjures a cloud to shroud Aeneas and his friend, Achates, so that they can enter the city of Carthage without being seen.
Blend in with your enviorment and act normally
Will proper staining and the right organism the nucleus of a cell can be seen without an electron microscope.
Be quiet. Moose get disturbed easily.
Probably.
so that it can hunt its prey without being seen
ANSWER:Because he can and he knows he can get away with it without being seen.
when you shoot without being seen. kind of like a hidden shooter
Your chances of 'getting around' in Antarctica without being seen are pretty high, since there aren't enough people there to 'see' you. It is, however, an extremely dangerous place to be without logistical support, guides, food, shelter and companions who can save your life if necessary.