en.wikipedia.org/wiki/Antares

The sentence is wrong for two separate reasons.

1. Antarctica is not entirely south of 64°S. Argentina’s official page for its Antarctic bases places Base Esperanza on the Antarctic Peninsula at 63°24′S, which is north of 64°S. That alone disproves the statement that “the whole continent is above 64° S latitude.”

2. Antares is therefore not circumpolar everywhere in Antarctica. SIMBAD lists Antares at declination −26°25′55.2094″. In the southern hemisphere, a star is circumpolar only if the observer is far enough south that the absolute values of latitude and declination sum to more than 90°. At Base Esperanza (63°24′S), the sum is about 89°50′, which is less than 90°. So from at least that Antarctic location, Antares must rise and set rather than remain permanently above the horizon.

So the article’s blanket claim about the whole of Antarctica is false.