large roomsshows the different ______ of genders.
38、 High densitymay reduce helping behaviour due to the ______.
39、 People feelless crowding if they can ______ more over the situation.
40、 The mosteffective way to reduce the effect of high density on human beings is ______.
Ants could Teach Ants
The ants are tiny and usually nest betweenrocks in the south coast of England. Transformed into research subjects at theUniversity of Bristol, they raced along a tabletop foraging for food -- andthen, remarkably, returned to guide others. Time and again, followers trailed