Medical research

Scientists discover molecule triggers sensation of itch

Scientists at the National Institutes of Health report they have discovered in mouse studies that a small molecule released in the spinal cord triggers a process that is later experienced in the brain as the sensation of ...

Dentistry

Dental surgeon adds music to drill to appease patients

(Medical Xpress)—Doctor Dhanni Gustiana, a dental surgeon in the Indonesian city of Purworejo has devised a unique way to calm patients undergoing dental procedures. He's connected an MP3 player to a dental drill that plays ...

Health

New pathways open for female reproductive health care

Two important new avenues have opened up for women to access reproductive health care medications. Several high-profile retailers merit commendation for their contributing role. Their involvement is an example of conscientious ...

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Mail

Mail, or post, is a system for transporting letters and other tangible objects: written documents, typically enclosed in envelopes, and also small packages are delivered to destinations around the world. Anything sent through the postal system is called mail or post.

In principle, a postal service can be private or public. Governments often place restrictions on private postal delivery systems. Since the mid-19th century national postal systems have generally been established as government monopolies with a fee on the article prepaid. Proof of payment is often in the form of adhesive postage stamps, but postage meters are also used for bulk mailing.

Postal authorities often have functions other than transporting letters. In some countries, a Postal Telegraph and Telephone (PTT) service oversees the postal system as well as having authority over telephone and telegraph systems. Some countries' postal systems allow for savings accounts and handle applications for passports.

This text uses material from Wikipedia, licensed under CC BY-SA