Even when biologically speaking humans can live forever, there are still accidents, violence, natural disasters, etc, that can extinguish life.
Each threat is major topic in its own right but its important to keep an eye on them as the bigger the problem the longer it takes to fix it.
Artificial Intelligence (AI) - Will it help or destroy us?
Climate Change - technology should come up with solutions but I suggest erring on the side of caution for now
Energy - where is it all going to come from to power technological advances and maybe reverse climate change?
Earth Monitoring - massive monitoring projects to help predict and prevent natural disasters
Natural Disasters - earthquakes, volcanoes, tsunami and more
Pandemics - diseases can spread faster than we can produce cures and vaccines
Society - If society doesn’t survive, then you don’t survive… technology giveth, and technology taketh away!
Immortality roadmap - Turchin Alexei's maps of global catastrophic risks including natural disasters, biological weapons and genetic engineering.
Survival Blog Posts
James Lovelock predicts the Anthropocene may quickly be replaced by the NovaceneNBC News - 25-Aug-2019
He doesn't think humans will merge with technology (Kurzweil style)Read more...
Aerogel sheet demonstrates ability to make Mars fertileGuardian - 15-Jul-2019
For long term space voyages we will need to grow food and use local resourcesRead more...
We’ve managed to protect astronauts from health risks of space radiationDiscover - 04-Jul-2019
We'll have to limit health risks of space travel to colonise other worldsRead more...