The idea that a chimpanzee and human can interbreed, forming a hypothetical hybrid species known as a humanzee, is not uncommon. Since chimpanzees and humans are closely related species (sharing 95% of their DNA sequence, and 98% of coding DNA sequences), it has lead to contested speculation that a hybrid is possible, though no specimen has ever been confirmed.

While there is a commonality in gene sequence between us and chimpanzees, humans still have one fewer pair of chromosomes (46 chromosomes) than other apes (48 chromosomes). This makes conception between the two species naturally impossible. However, a different numbers of chromosomes is not an absolute barrier to hybridization. Similar mismatches are relatively common in existing spec ...

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Did you know -- On the average there are over one hundred thousand strands of hair on a young adult. Blondes average about 140,000 strands, brunettes average 108,000 and redheads average 90,000.

From vanilla to barbecue to fruit loops, many male butterflies have a distinct smell, known to scientists as pheromones, used to attract females. These pheromones are produced in specialized scales on the wings and are often wafted over females during courtship by flapping. The smells are often oddly familiar to humans, and Opsiphanes butterflies (as seen here) can leave you desiring a piece of cake after catching one in the Amazon.

Chewing sticks are used by many people instead of toothbrushes. The neem tree grows in many Asian, African, and Middle Eastern countries. Indigenous people in these areas know that chewing neem twigs is good for their teeth. The epidermal tissues contain chemicals that kill bacteria and reduce inflammation. The study of how indigenous (native) plants are used by different cultures is known as ethnobotany.

The oldest recorded tortoise was Tu'i Malila, who died in 1965 aged 188. The tortoise in the image was named Harriet, and was the third oldest recorded tortoise.