Science news today is led by a stark climate signal: the world’s oceans recorded their hottest June ever, with European monitors warning that human-driven warming may now be reinforced by a developing El Niño, raising the risk of still more records in the months ahead. Elsewhere, the FBI says every ransom note tied to the disappearance of Nancy Guthrie is fraudulent, cutting through months of conflicting claims but leaving the underlying mystery unresolved. In media, CNN chief legal affairs correspondent Paula Reid is expected to exit as ownership uncertainty swirls around Warner Bros. Discovery, with reports pointing to a move to rival MS NOW. In Nigeria, teachers in Oyo State have suspended a strike triggered by kidnappings of educators and schoolchildren after government security assurances. And in Malta, businessman Yorgen Fenech has gone on trial accused of ordering the 2017 murder of journalist Daphne Caruana Galizia.