Short explanation of the history of Dr. Rontgen's discovery of X-rays in 1895.

Short explanation on environmental problems caused by microplastics.

Short history of Chicago Pile-1, the world first nuclear reactor built by Professor Enrico Fermi and his team. 

Short talk on the giant earthquake and tsunami. 

Short explanation on the coastline paradox, how the whole length of the coast line of Japan depends on the scale used for the measurement.

Short explanation on the Jules Gabriel Verne's 1864 novel, "Voyage au centre de la Terre". 

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. 

Brief explanation about the significance of rare earth elements (15 lanthanides elements plus yttrium and scandium).

Memory of 40 years' experience about computer programming for scientific research.

Explaining the reason why I recommend to take enough rest and good sleep for tomorrow. 

Personal impression on Kazuo Ishiguro's 2015 novel, "The Buried Giant".

Personal impression on Kazuo Ishiguro's 2005 novel, "Never Let Me Go".

Personal impression on Kazuo Ishiguro's 1989 Novel, "The Remains of the Day".

Personal impression on Kazuo Ishiguro's 1982 Novel, "A Pale View of Hills".

Brief explanation on one of confusing logical paradoxes, Liar's Paradox.

Brief explanation on the significance of trace element analysis.