On a dusty field on the east side of Mexico’s sprawling capital, some 500 Ukrainian refugees are waiting in large tents under a searing sun for the United States government to tell them they can … more

Climate change and habitat loss from big agriculture are combining to swat down global insect populations, with each problem making the other worse, a new study finds.  more

KYIV, Ukraine (AP) — Russia assaulted cities and towns along a boo- merang-shaped front hun- dreds of miles long and poured more troops into Ukraine on Tuesday in a potentially pivotal battle … more