100 million-year-old sea microbes are alive and thriving, study finds No Comments Uncategorized Humans can go without food for about three weeks before the effects of starvation begin to kill them. Humans can go without food for about three weeks before the effects of starvation begin to kill them. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to print (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on WhatsApp (Opens in new window)