Letters to the editor from the March 2020 issue of Scientific American
Top news from around the world
What scientists know about the inner workings of the pathogen that has infected the world
The accuracy of screening tests is highly dependent on the infection rate
Conservation projects in the developing world should invest in local scientific talent and infrastructure
If confirmed, the controversial result could open new vistas on cosmic collisions
The gross ecosystem product, or GEP, tries to take into account the contribution of nature to the economy.
Much of the warming is linked to natural climate cycles happening thousands of miles away in the tropics
Existing in the “mass gap” dividing two classes of cosmic heavyweights, the object could be the most massive neutron star, the lightest known black hole—or something stranger...