US entertainment giant Warner Bros. Discovery has said it is exploring a potential sale of all or some of its media assets, this after it turned down a second takeover bid by rival Paramount Skydance and its CEO David Ellison. The company, which houses such properties as Warner Bros. Studio, CNN and HBO Max, saw its shares surge on Tuesday. Also in this edition: Brazil allows state oil giant Petrobras to explore an oil site at the mouth of the Amazon River, in spite of environmental concerns.