- In the second year of Russia’s full-scale invasion of Ukraine, Russian authorities have further intensified efforts at home to eradicate any dissent about the war or the Kremlin’s domestic policies. They adopted and enforced new, repressive legislation, issued punitively long prison sentences for peaceful anti-war speech, and forcibly closed several prominent human rights groups.
- Osteichthyes (Wikipedia)
Osteichthyes (/ˌɒstiːˈɪkθi.iːz/), also known as osteichthyans or commonly referred to as the bony fish, is a diverse superclass of vertebrate animals that have endoskeletons primarily composed of bone tissue. They can be contrasted with the Chondrichthyes (cartilaginous fish) and the extinct placoderms and acanthodians, which have endoskeletons primarily composed of cartilage. The vast majority of extant fish are members of Osteichthyes, being an extremely diverse and abundant group consisting of 45 orders, over 435 families and 28,000 species. It is the largest class of vertebrates in existence today, encompassing most aquatic vertebrates, as well as all semi-aquatic and terrestrial vertebrates.