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The most instgrammed locations in Canada

Canada’s large land mass and broad longitudinal range make it one seriously awesome place to explore. Given the incredible amount to see and do in each of the 10 provinces and three territories, it could be very difficult to narrow down the list of most popular locations. Fortunately, Instagrammers provided plenty of information – and the best locations have emerged.

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Evolution has sculpted the human genome to cope with Earth’s toughest climates, inadvertently pointing geneticists towards medically important genes.

That’s the opposite way round to how many other geneticists work. They often start with the trait and try to find relevant genes. Nielsen, however, started by finding genes that evolution had already flagged as being important, and then worked out what traits those genes influence. “First, we find the bit of the haystack where the needle might be,” he explains. And his team did the same thing in Tibet and Ethiopia, identifying genes that help local people cope with air that has 40 percent less oxygen than what most of us inhale.

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Smithsonian curators present a virtual tour of objects from the history of vaccination

These are the instruments that brought down polio, smallpox and diphtheria—diseases that in the past two centuries have killed thousands annually. By the end of the 20th century, however, mass vaccination programs have completely eradicated or brought these diseases under control both in the United States and abroad.

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Eight cities that show you what the future [may] be like

Cities used to grow by accident. Sure, the location usually made sense—someplace defensible, on a hill or an island, or somewhere near an extractable resource or the confluence of two transport routes. But what happened next was ad hoc. The people who worked in the fort or the mines or the port or the warehouses needed places to eat, to sleep, to worship. Infrastructure threaded through the hustle and bustle—water, sewage, roads, trolleys, gas, electricity—in vast networks of improvisation. You can find planned exceptions: Alexandria, Roman colonial towns, certain districts in major Chinese cities, Haussmann’s Paris. But for the most part it was happenstance, luck, and layering the new on top of the old.

At least, that’s the way things worked for most of human history.