How was communication by telegraph an improvement over communication by mail carriage

The telegraph was not the first system for transmitting information remotely. Several peoples had developed communication methods allowing information to be transmitted over long distances using smoke signals or torches placed on high points. These systems were however limited in their possibilities of expression; the telegraph is distinguished by the use of an alphabet or linguistic code making it possible to transmit any type of message, without being limited to a set of predefined messages.

With the passage of time, communication by mail was developed, but in this case it took a great cost of time, since letters could take weeks to reach their destination, thus removing the usefulness and effectiveness of the communication.

The telegraph, then, came to solve this problem by providing an effective means of communication, both in terms of the immediacy of the transmission of the message and the distance between which two people could communicate.

genetics is the study of how dna works, the methodologies defining the new recent technologies allow scientist to have a panoramic view of the entire dna landscape, especially how genomes interact with their environment, including off course, factors outside their organisms.

thus is very possible the existence of both scenarios, where populations of isolated individuals have different genetic traits, and share traits related to genetic mutation, due rats can easily travel overseas using human transport channels. so scientists could get a vast number of data, including human interaction, evolution of rodents, health development, spread of infections, development of new organisms, how genomes evolve in different environments and so on.

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.