no. no humans have ever been to any of the other planets.
No. Humans have only been on Earth and the Moon.
Yes it has, by remote space vehicles, but not by humans directly.
Mercury was discovered in antiquity and has been known to humans since at least 3000 BC. It has been observed for thousands of years as it is visible to the naked eye in the sky.
As of 2014, humans have not set foot on the planet Mercury. To date, the only probes sent have been Mariner 10 which did a flyby, and the MESSENGER orbiter; both probes from NASA.
Humans have sent space probes to take pictures of Mercury from orbit around the planet, but we have not sent a man to Mercury. Sending people to Mercury would be hard because it is so dangerously close to the sun.
yes
Not likely.
Not likely.
Mercury has the lack of oxygen and humans.
Mercury is hazardous to humans and animals
Methyl mercury is more toxic to humans than inorganic mercury. Methyl mercury is a highly toxic organic form that can accumulate in living organisms and bioaccumulate in the food chain, leading to potential health risks when consumed by humans. Inorganic mercury compounds are generally less toxic and less likely to bioaccumulate.
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