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 confirmed in southern Africa this year, following a case in Malawi in mid-February. In a statement, Dr. Matshidiso Moeti, WHO regional director for Africa, called the outbreak of poliovirus in Mozambique “greatly concerning.” She added that efforts were underway to help strengthen disease surveillance in Malawi, Mozambique, Tanzania, Zambia and …

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 ocean acidification reached record highs last year. “We must end fossil fuel pollution and accelerate the renewable energy transition before we incinerate our only home,” U.N. Secretary-General Antonio Guterres said. “Time is running out.” His latest stark warning about possible environmental disaster comes after the World Meteorological Organization issued its …

 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, a congressional hearing focused on UFOs for the first time in 50 years, this time looking at their threat to national security — not from people from other worlds, but from potential international adversaries on Earth.   The hearing came nearly a year after a government report documented more than …