Richard Hamblyn on how the life stages of the salmon are marked by words unchanged since Chaucer's time:
Born in a ‘redd’, a shallow, gravel-covered depression dug by the female in the days before spawning, newly hatched salmon begin life as ‘alevins’, tiny, buoyant creatures with their yolk sacs still attached. Once the yolk has been absorbed, the fast-growing fish, now known as ‘fry’, are able to feed for themselves, turning instinctively to face the current in order to graze on drifting insect larvae. Some months later, the juvenile salmon, now known as ‘parr’, move downstream to deeper water ...
Ancient bacterium discovery rewrites the origins of syphilis
-
A 5500-year-old genome recovered from human skeletal remains in Colombia
may give insights into the early evolution of syphilis and its relatives
4 hours ago




No comments:
Post a Comment