LifeHow our ape ancestors suddenly lost their tails 25 million years ago Why don't humans have tails? A comparison of the genomes of apes and monkeys has revealed the mutation that caused the ancestors of apes to lose these appendages, a change that did not happen gradually but all at once 51¶¯Âþ
LifeAncient comb jelly had more complex nerves than its modern relatives A 500-million-year-old comb jelly is so well-preserved that it’s possible to see it had a nervous system more complex than that of modern comb jellies 51¶¯Âþ