Are there any scientific achievements by ancient civilizations that baffle scientists today?

There are not any scientific achievements of any ancient civilisations that baffle scientists today. However, there are some things which impress scientists and engineers today that were produced by ancient societies, examples include:
1) Lycurgus Cup - Wikipedia: Roman dichroic glass (gold and silver nanoparticles in glass), that change colour depending on whether the light source is behind (transmissive) or in front of the object (reflective). Those that made the artefact are unlikely to understand the physics, but this can be achieved with straightforward technology they had to hand, place a small quantity of gold and silver (ideally filings) with glass in a leather pouch and hit it with a hammer for many hours, the metal is ground into ever smaller particles, eventually becoming nanoparticles - it is likely that the creator was experimenting with imparting metallic properties to glass and discovered this by accident, what a discovery.

What are the biggest misconceptions about biology?

There are only five senses in Human beings- No,apart from sense of Touch, Taste,Sight,Hearing & Smell.Humans have also sense of Position,Pain,Itch, Thirst ,Balance,Body-Temperature, Hunger,Direction,Passage of Time, Muscle-Tension and so on....Goldfish cannot remember things- No,they can remember things,they don't forget in 3 seconds only.Can turn a Worm into Two- No,if a worm is cut,only half

Should I stop eating to lose weight?

To really see best results from any diet plan you choose to use, you need to learn a few ‘diet commandments'. These are guidelines that must be followed if you are going to see superior results that will help propel you forward.Sadly, many people miss out

My left bicep is larger than my right, but my right is fairly stronger. How do I get them to equal size and strength?

Have you measured them? By fairly stronger what are we taking about? We naturally tend to use favor an arm for certain tasks, so it's bound to happen.On a big scale of things I believe my left slightly looks better as well, but honestly I don't focus on it. My