science and nature: what is canis lupus?

Questions

in greek mythology, how long did penelope wait for odysseus to return from the trojan war?

during which geologic era did insects, fish, amphibians, and reptiles first appear on earth?

who was the first recipient of the jarvik-7 artificial heart?

what is the british dish made from cheddar cheese and beer?

from what is welsh rarebit made?