How long humans on earth?

Since this is a space website, it’s also worth noting when humans began leaving Earth. The first human mission to space took place April 12, 1961 when Soviet cosmonaut Yuri Gagarin made a single orbit of Earth in his spacecraft, Vostok 1. read more

The mental abilities of humans are remarkable compared to other apes. Humans' ability of speech is unique among primates. Humans are able to create new and complex ideas, and to develop technology, which is unprecedented among other organisms on Earth. read more

Humans would be wiped out, but other forms of life would go on . But even if that's true, it didn't even get close to killing everything. There has been warning after warning that deadly GRBs could one day wipe out life on Earth, but it's unlikely that any of the potential nearby sources pose a credible threat. read more

The combined biomass of all humans on Earth in 2018 was estimated at ~ 60 million tons, about 10 times larger than that of all non-domesticated mammals. In 2004, some 2.5 billion out of 6.3 billion people (39.7%) lived in urban areas. read more