Is one dog year really equal to seven human years?
One year may FEEL like seven to your dog if you're dressing him up like a baby and pushing him around in a carriage, but that's the closest you can come to making the seven year rule true. Originally a dog food marketing ploy, this
common misconception is flawed in two important ways.
First, and I hope this doesn't come as a shock to you, dogs develop differently than people. For instance, many puppies reach their adult height by six months of age, which in human years would make for some very dangerous toddlers.
Second, dogs mature at different rates. With over 130 breeds recognized by the American Kennel Club weighing in at anywhere from one pound to two hundred, it's easy to see why no hard and fast rule can be applied. If you really need to compare Rover to your kids, some scientists believe that 4 to 6 years per human year is a little more accurate.
(Main Source: THE COLLEGE OF OBSCURE KNOWLEDGE By Jim Marbles)
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A gale force wind is a wind blowing between 39 to 26 miles per hour.

Left-handedness is extremely common in twins. It is unusual, however, for both to be left-handed.

There are close to 4,000 known species of frogs, including toads.

The biggest frog is the appropriately named Goliath frog (Conraua goliath) of Cameroon. They reach nearly 30cm (a foot) and weigh as much as 3.3 kilograms.

The smallest frog is the Gold frog (Psyllophryne Didactyla) of Brazil. They grow to only 9.8 mm (3/8 inch).

Only one-fifth of air is oxygen. Most of the rest is nitrogen.

Mount Everest is more than 29-thousand feet high, which makes it almost
50-percent taller than Mount McKinley.

Mount McKinley is taller than Africa's Kilimanjaro or Japan's Mount Fuji or any of the Alps. That should give you an idea how tall Everest really is.

Over 90% of the calories you burn are used to maintain your body temperature.  A good way to lose weight is, therefore, to expose your body to the cold.

The insulation of the fuel tanks on a Saturn V rocket was so good an ice cube placed inside would take 8 years to melt.

Mosquito repellents don't repel. They hide you. The spray blocks the mosquito's sensors so they don't know you are there.
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Why does inhaling helium make your voice sound funny?
This party stunt almost never fails to amuse when it gives a chipmunk-like voice to even the most masculine man. I've often wondered who originated this stunt, and what else did they suck up in their quest for the funny voice?
The secret to this trick lies in the fact that helium is less dense than air. The less dense the medium, the faster your vocal chords will vibrate, in this case making your voice sound higher pitched. A lower pitch can be achieved by inhaling a gas that's heavier than air, such as xenon, but a party decorated with xenon filled balloons doesn't sound as fun.
(Main Source: DO PENGUINS HAVE KNEES? By David Feldman)
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What does the US Postal Service do with mail it can't deliver?
n researching this answer, I found a job that I would like to do almost as much as I like writing trivia. Any mail that is improperly addressed or otherwise undeliverable is sent to a "dead letter" office if the outer envelope doesn't have a return address on it. There, a Postal employee opens the envelope and checks out the contents. I'm so curious, I would love to open other people's mail for a living.
If there's no indication on the inside of the letter of who sent it to whom , it is immediately destroyed. If the envelope contains anything of value, the contents are
usually retained for about 90 days in case someone is trying to find them. Any unclaimed items are auctioned off to the public, and cash is placed into a general fund. Money that remains abandoned after 1 year is rolled over into a general account to be used by the Postal Service however they see fit.
(Source: DO PENGUINS HAVE KNEES? By David Feldman)

Why is there a black dot in the middle of pure white bird droppings?  Well, the black dot is the actual fecal matter; all of that white stuff is a bird's urine.  A bird's fecal matter and urine basically combine together and are expelled at the same time out of the same orifice.  The fecal matter rests in the middle of bird droppings because the urine's consistency is sticky and sticks to that other stuff.