- Gnathostomata (Wikipedia)
Gnathostomata (/ˌnæθoʊˈstɒmətə/; from Ancient Greek: γνάθος (gnathos) ‘jaw’ + στόμα (stoma) ‘mouth’) are the jawed vertebrates. Gnathostome diversity comprises roughly 60,000 species, which accounts for 99% of all living vertebrates, including humans. In addition to opposing jaws, living gnathostomes have true teeth (a characteristic which has subsequently been lost in some), paired appendages (pectoral and pelvic fins, arms, legs, wings, etc.), the elastomeric protein of elastin, and a horizontal semicircular canal of the inner ear, along with physiological and cellular anatomical characters such as the myelin sheaths of neurons, and an adaptive immune system that has the discrete lymphoid organs of spleen and thymus, and uses V(D)J recombination to create antigen recognition sites, rather than using genetic recombination in the variable lymphocyte receptor gene.
- Red Sea crisis (Wikipedia)
The Red Sea crisis began on 19 October 2023, when the Iran-backed Houthi movement in Yemen launched missiles and armed drones at Israel, demanding an end to the invasion of the Gaza Strip. The Houthis have since seized and launched aerial attacks against dozens of merchant and naval vessels in the Red Sea, drawing hundreds of air strikes on missile sites and other targets by US and allied forces. The crisis is linked to the Israel–Hamas war, the Iran–Israel proxy conflict, the Iran–United States proxy conflict, and the Yemeni crisis.