Humans are bipedal primates with vertical forehead and 1,400cc brain volume. They have smaller teeth, prominent chin, and bilaterally symmetrical bodies. Humans lack external tail and are sexually dimorphic. Adult human body contains about 100 trillion cells
Immortal jellyfish can potentially live indefinitely, possibly for 66 million years. They are only 3 millimetres in diameter and can age in reverse. They are easily killed by predators including fish, sharks, turtles and jellyfish
Erikson developed eight stages from infancy to late adulthood. Theory combines biological and sociocultural forces in development. Each stage presents a psychosocial crisis between conflicting forces. Successful resolution leads to corresponding virtues
Damselflies are flying insects in suborder Zygoptera, similar to dragonflies. They are smaller and have slimmer bodies than dragonflies. Wings fold along body when resting, unlike dragonflies. Found on all continents except Antarctica
Moths have over 160,000 species worldwide, compared to 17,500 butterfly species. Most moths are nocturnal and live only 40 days. Their wingspan ranges from 4 millimeters to over 9 inches. Their bodies are covered in scales that look like small hairs
Butterflies have transparent wings made of chitin with colorful scales. They use proboscis for feeding and sensory organs on head. Wings need to be warmed before flight and must dry after emergence. Body temperature should be about 82°F for optimal flight