Veritasium on MSN
Why scientists warn that UV radiation is a major cancer risk
Ultraviolet radiation from the sun and artificial sources can penetrate skin cells and damage DNA. Over time, this damage ...
In some parts of Canada where winters aren't always this frigid, people may not realize that frostbite is a real risk.
The Assembly of First Nations is warning First Nations individuals to be wary of crossing the border into the United States.
一些您可能无法访问的结果已被隐去。
显示无法访问的结果