The World Health Organization says authorities in Mozambique have declared an outbreak of wild poliovirus type 1 after confirming that a child in the country’s northeastern Tete province has contracted the disease. It becomes the second case of wild poliovirus …

The United Nations chief on Wednesday launched a five-point plan to jump-start broader use of renewable energies, hoping to revive world attention on climate change as the U.N.’s weather agency reported that greenhouse gas concentrations, ocean heat, sea-level rise, and …

 The U.S. government has often ignored the possibility of unidentified flying objects, even after decades of unexplained sightings, including by U.S. military pilots who sometimes filmed the UFOs, some of which moved with lightning speed and incredible agility.  On Tuesday, …