Short introduction of the Apollo 13 accidents in space and the safe return to the earth. 

Short explanation on the history of Wavelet transform analysis. 

Short talk on the history of Friday 13th, and my plan on the next Friday 13th (November 13, 2020).

Brief explanation on latest progresses of cryo-electron microscope and cryo-X-ray microscope. 

Short talk on the new character, the fastest train, Kenji from Japan, appearing in the latest season 24 in "Thomas and Friends".  

Short and comprehensive introduction  about ozone hole. 

Short introduction on the X-ray experiments done by NASA's Mars rover. 

A brief explanation about scintillating crystals, which can be used for visualizing invisible radiation. 

Some short stories about British accent. 

Some stories on arsenic poisoning and contribution of modern analytical methods.