The first postage stamps were issued in 1840, and the geography of the world has since seen lots of changes. Some of the most interesting collectible stamps are those issued by states that no longer exist â these states are known as âdead countriesâ by philatelists.
Eggs are off-white and marked with brown and lavender. Young turkey vultures hatch in 30 to 40 days and then take another 9 to 10 weeks to learn how to fly. They are are independent about a week later.ggs are off-white and marked with brown and lavender. Young turkey vultures hatch in 30 to 40 days and then take another 9 to 10 weeks to learn how to fly. They are are independent about a week later.
Insect and spider eggs may take a matter of days to hatch, but some insect eggs overwinter and mâ¦ay take over half a year to hatch. Birds' eggs may take around three to four weeks but even that is not consistent - the kiwi's egg has an incubation period of 70-80 days. The eggs of reptiles also vary. Crocodiles' eggs, for example, take around 65 days to hatch, whereas tortoise eggs may take anywhere between 70 and 120 days to hatch, depending on the species. There are three species of mammals which lay eggs (monotremes, comprising the platypus, short-beaked echidna and long-beaked echidna). Monotreme eggs, once laid, hatch in just ten days. 2 weeks