- Navigating a Sticky Situation (hakaimagazine.com)
Head down, he navigates by interpreting the swells beneath his vessel. The sea’s subtle movements and his years of experience help him read the waves. The choppy sea surface, caused by westward-moving swells refracting around land, tells him an island lies somewhere to the east.
- Halogen (Wikipedia)
The halogens (/ˈhælədʒən, ˈheɪ-, -loʊ-, -ˌdʒɛn/) are a group in the periodic table consisting of six chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and the radioactive elements astatine (At) and tennessine (Ts), though some authors would exclude tennessine as its chemistry is unknown and is theoretically expected to be more like that of gallium. In the modern IUPAC nomenclature, this group is known as group 17.