1 Heat oil in a wok (with a few drops of sesame oil added) and stir fry the pork. 2  When the pork is cooked remove it from the pan and set aside. 3  Add all the vegetables to the pan and stir fry. 4  While the vegetables are cooking whisk together the chicken stock, oyster sauce and cornstarch in a bowl.
Say what? Helium is pronounced as HEE-lee-em. Helium, the second most abundant element in the universe, was discovered on the sun before it was found on the earth. Pierre-Jules-CÃ©sar Janssen, a French astronomer, noticed a yellow line in the sun's spectrum while studying a total solar eclipse in 1868.
Since helium makes up about a quarter of the mass of the sun, it is not surprising that its presence was detected there over 100 years ago. What is perhaps surprising, is that helium was discovered in space 26 years before it was found on earth. It has been known for hundreds of years that certain elements impart characteristic colours to a flame-a fact crucial to the coloured fireworks that we enjoy.