Johann Gutsmuth and Friedrich Jahn started making devices that young people could use for gymnastics. Among the devices were the ring, pommel horse, and the vault. The balance beam, the parallel bars and the horizontal bar were also developed.

During the 18th and 19th centuries, gymnastics was still seen as a training exercise. But later, it became more of a sport than a military training regime.

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  • Nerves are cylindrical bundles of fibers that start at the brain and central cord and branch out to every other part of the body.
  • Neurons send signals to other cells through thin fibers called axons, which cause chemicals known as neurotransmitters to be released at junctions called synapses.
  • A synapse gives a command to the cell and the entire communication process typically takes only a fraction of a millisecond. Signals travel along an alpha motor neuron in the spinal cord 268 mph (431 km/h); the fastest transmission in the human body, according to Discover magazine.
  • In the 14th century, Venetian craftsmen made eyeglasses. The lenses were convex to correct far-sightedness.
  • In 1451 Nicholas of Cusa from Germany produced concave eyeglass for near-sighted people.
  • In the 17th century, frames of steel were invented.
  • British optician Edward Scarlett invented eyeglasses where the frame could be placed over the ears and nose.
  • Benjamin Franklin invented bifocals.
  • In 1827, Sir George Biddle Airy invented glasses to correct astigmatism.
  • In 1971, a lens was developed which combined plastic with glass.

There are cases where people are persistently experiencing the feeling of Déjà Vu. The cause can be taking a mixture of medications that can have unpredictable side effects, as in some documented cases.

The Fight-Or-Flight Response is an automatic survival technique to preserve our life, and is crucial for how we deal with stress, threats, and danger.

It primes our body to perform under pressure, making sure we are at our best when dealing with life-threatening situations, making it more likely for us to survive.

❤️ Brainstash Inc.