Nyatwit
Nyatwit t1_iv4ubpv wrote
AIDS is the condition is caused by HIV viruses. There can be different variants as shown below but they are all HIV.
"[HIV] has nine named strains: A, B, C, D, F, G, H, J, and K. Some of these have sub-strains. Researchers find new strains all the time as they learn more about HIV-1 group M. The B strain is the most common in the U.S. Worldwide, the most common HIV strain is C."
Nyatwit t1_ivdu5oa wrote
Reply to comment by MrRumfoord in Insects get stuck in a spider's web, why doesn't a spider get stuck in its own web? by Koning_Health
Aka dragonflies.. They are not exactly on the top of the evolutionary chart but some of the most efficient fliers. The can fly forwards, backwards and hover.