Now you Know

2970. Fact
Babies start dreaming even before they're born.

2971. Fact
In literature, the average length of a sentence is around 35 words.

2972. Fact
Leonardo Da Vinci never signed or dated his most famous painting, the Mona Lisa

2973. Fact
The symbol on the pound key (#) is called an octothorpe.

2974. Fact
Mercury is the only metal that is liquid at room temperature.

2975. Fact
The sperm count of an average American male compared to thirty years ago is down thirty percent

2976. Fact
Because metal was scarce; the Oscars given out during World War II were made of plaster.

2977. Fact
A cat has 32 muscles in each ear.

2978. Fact
The 1st winner of the Academy Award for best picture, and the only silent film to achieve that honor, was the 1927 film, "Wings".

2979. Fact
Pearls melt in vinegar.

2980. Fact
The number of triplets born in the US in 1994 (4,594) was more than triple the number born in 1971 (1,034), an increase attributed to older age of the mothers and the use of fertility-enhancing drugs and techniques.

2981. Fact
Every Swiss citizen is required by law to have a bomb shelter or access to a bomb shelter.

2982. Fact
The states with the most presidential burial sites: Ohio and Virginia (tie).

2983. Fact
Moscow weathermen can be fined for inaccurate weather forecasting.

2984. Fact
Before roasting, some green coffee beans are stored for years, and experts believe that certain beans improve with age, when stored properly.

2985. Fact
The largest employer in the world is the Indian railway system in India, employing over 1.6 million people

2986. Fact
When sharks bite down, their eyes automatically close in case their prey starts squirming trying to get free, and thereby cause damage to the shark's eyes in the process.

2987. Fact
If you attempted to count to stars in a galaxy at a rate of one every second it would take around 3,000 years to count them all.

2988. Fact
A common custom in Spain is to eat one grape for each of the last 12 seconds of every year for good luck

2989. Fact
The only 15 letter word that can be spelled without repeating a letter is uncopyrightable.

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Simple Science

Some Uses of a Thermometer

Heat:
One of the chief values of a thermometer is the service it has rendered to medicine. If a thermometer is held for a few minutes under the tongue of a normal, healthy person, the mercury will rise to about 98.4 F. If the temperature of the body registers several degrees above or below this point, a physician should be consulted immediately. The temperature of the body is a trustworthy indicator of general physical condition; hence in all hospitals the temperature of patients is carefully taken at stated intervals.

Commercially, temperature readings are extremely important. In sugar refineries the temperature of the heated liquids is observed most carefully, since a difference in temperature, however slight, affects not only the general appearance of sugars and sirups, but the quality as well. The many varieties of steel likewise show the influence which heat may have on the nature of a substance. By observation and tedious experimentation it has been found that if hardened steel is heated to about 450 F. and quickly cooled, it gives the fine cutting edge of razors; if it is heated to about 500 F. and then cooled, the metal is much coarser and is suitable for shears and farm implements; while if it is heated but 50 F. higher, that is, to 550 F., it gives the fine elastic steel of watch springs.

A thermometer could be put to good use in every kitchen; the inexperienced housekeeper who cannot judge of the "heat" of the oven would be saved bad bread, etc., if the thermometer were a part of her equipment. The thermometer can also be used in detecting adulterants. Butter should melt at 94 F.; if it does not, you may be sure that it is adulterated with suet or other cheap fat. Olive oil should be a clear liquid above 75 F.; if, above this temperature, it looks cloudy, you may be sure that it too is adulterated with fat.

FIG. - A well-made commercial thermometer.

English Phrases
Hobbies are activities that we do in our spare time (= free time)

Things people play



Note: People join clubs (= become members of clubs) where they can play cards and chess.

Things people collect



Outdoor activities



With these hobbies we can use two different verbs, go and do:
We often go camping in the summer, or I do a bit of / a lot of rock climbing in the summer.

Creative hobbies



Note: When we start a hobby for the first time we often use the phrasal verb take up, and when we stop doing the hobby for the final time, we often use the phrasal verb give up.
I took up golf when I was fifteen, but I gave it up last year.
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