Silk was kept secret b/c of its value
Yes, for many hundreds of years the Chinese potters had and kept the secret.
China. China first discovered the secret of the silk worms. They kept it a secret for many years until one day a few silk worms were smuggeld out of China and it slowly spread through the East. AMerica tried to make silk, but out environment couldn't support the silk worms.
President Wilson had a stroke. It was kept a secret.
They aren’t kept secret.
pen and ink
chocolate
The Gobi Desert kept China isolated.
Silk trade was famous in ancient China because back then, only China knew how to make silk, and anything rare is usually worth a lot. China kept silk-making a secret from the rest of the world.
Secrets should be kept secret because if they were not, everyone would know it. If everyone knew your secret, then you probably wouldn't be too happy. And a secret would not be secret then.
Best Kept Secret - song - was created on 2010-09-03.
It was never invented. It was a peice of stolen alien technology kept secret by the government for years.
1922 but apparently been kept a secret by the government for 90 years. It aint true