TOPIC: Evolution
#16: Mus spretus and Mus domesticus look similar, but crosses between these two species of mouse fail to produce offspring because of a single genetic incompatibility. read more
#14: Starfish are our distant cousins. Sea urchins and other echinoderms are the closest relatives of the vertebrates. read more
#24: Girls born today are expected to live 4.2 years longer than boys, although this gap is gradually narrowing. read more
#19: Losing a gene can be a good thing. A mutated caspase-12 gene has been selected for during human history; it may make us less likely to suffer from sepsis. read more
#17: Most living things can make vitamin C, but some that can't - including humans, other primates, guinea pigs and bats - rely on their diet to get it. read more
#15: Analysis of DNA from museum specimens revealed that the dodo was a type of pigeon. read more
