Health

The hazards of living on the right side of a time zone border

The sun both rises and sets later in the western parts of time zones, by about an hour at the extremes. If sunrise in Nashville, Tennessee is 6:30 a.m., it's about 7:30 a.m. in Amarillo, Texas. Similarly, if sunset in Nashville ...

Diseases, Conditions, Syndromes

Needleless vaccine will protect children from dangerous viruses

Orally administered vaccine can protect millions from hepatitis B. Oral vaccines are both safer and less expensive than injections. Therefore, researchers are continuously pursuing ways to produce an oral vaccine that is ...

Health

When should you throw away leftovers?

Refrigeration is the most important invention in the history of food. But while commercial and home refrigerators have only been used for the past 100 years or so, people have long used cool natural environments to store ...

Health

Why we will probably never have a perfect clock

The time has come again when many of us switch our clocks from summer or daylight-saving time back to winter time. And the usual confusion sets in, is it an hour forwards or back? Why do we need to change the time at all? ...

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