Life would be very hard because then they may not be able to survive <span />
Explanation:
However, in 2016 researchers published a new set of Neanderthal DNA sequences from Altai Cave in Siberia, as well as from Spain and Croatia, that show evidence of human-Neanderthal interbreeding as far back as 100,000 years ago farther back than many previous estimates of humans' migration out of Africa (Kuhlwilm Dec 11, 2020
The virus becoms infection, and they create an epidemic that will last for a long time. This was the case back in the early days.
Example of multi cropping is tomatoes+onions+marigold