How many species have existed on earth?
49673
How many organisms have ever lived on Earth?
53130
Number of dissimilar terms in given expansion
23474
How can the number of genes increase through evolution?
27989
A book in which every species on earth was rendered intelligent
2887
How can natural selection occur at species level whilst not occuring at the individual level?
47777
How many White Walkers are there?
25645
Evolutionarily speaking, why do humans have 46 chromosomes
24212
proving how many permutations exist.
35730
How is genetic speciation defined?
1399
Why do only two sexes exist for animals?
66716
Does it make sense to classify all humans in a single species?
157435
How many of the 230 crystallographic groups are realized in nature?
60189
Is there more than one Basilisk?
92004
Looking for old book, SF, artificial world, different zones for different species that visitors "inhabit"
139013
Where is the rest of Yoda's species?
14797
How many DeLoreans existed at the same time?
86534
Why do the ancestors of birds still exist?