roentgen rays

X-rays have helped modern medicine a lot, but the early experiments to discover them cost human lives.

In the second half of 1895, when Anna Bertha Roentgen's husband spent several weeks studying in his lab, she devoted herself to serving her husband.

What are earth rays the rays? The story of Dr. Vu Van Bang's underground water, cave and remains seems very mysterious. Could it be a new invention like the case