New Zealand is among a bare handful of countries which have avoided community spread of the COVID-19 coronavirus. Here's how they did it.
A loss of Chinese students from the US - and the US$15 billion they spend on tuition - could have serious repercussions for American colleges and universities.
For combustion to occur, oxygen must be present. Ammonium nitrate prills provide a much more concentrated supply of oxygen than the air around us.
Nearly every country in the world shuttered its schools due to COVID-19. Now, from Israel to Uruguay, many students are back in class, with varying degrees of success.
As more is learned about the COVID-19 coronavirus, health officials are changing guidance, leading to public frustration and mistrust.
The WHO is a health agency, not a political one. Yet political leaders have often criticized it. Still, the move by the US to pull out from the organization is unprecedented.
Nanoparticles dressed up in cell membranes snag SARS-CoV-2 virus particles before they reach human cells.
In the midst of the COVID-19 coronavirus pandemic, United States President Donald Trump has decided to withdraw the country from the World Health Organization.
The border between Arizona and Sonora, Mexico, has been closed starting Saturday, to help slow the spread of the COVID-19 coronavirus pandemic.
The Arctic heat wave that sent Siberian temperatures soaring to around 100 degrees Fahrenheit on the first day of summer put an exclamation point on an astonishing transformation of the Arctic environment that's been underway for about 30 years.