A skylight. Neon green "EXIT" signs. Strong shadows... this mastodon (Mammut americanum) has everything! Here are some tips and ideas for taking better photographs in museums. Of course, you are awesome, and always check the photography rules at the museum you're visiting. They said you wouldn't, but I knew you would, because you're cool like that.
Light is one of those museum enemies. Believe it or not, light is hard on artifacts so understandably, good preservationists do all they can to keep it out. Specimens are often stored on shelves with dim, industrial lighting, and galleries are often dark. This makes your photography a challenge. A tripod can be your best friend in low-light conditions. Check with the museum you're visiting to see if they're allowed.
Location, location, location. It is not always an option, especially with large museum specimens, but if you can isolate your subject, do it.
Photoshop can mend a lot. If your image is shamelessly shadowed, try Shadows/Highlights (Image>Adjustments>Shadows/Highlights). In a perfect world, we would have time to stage and set lighting, but in the real world, we fix it with photoshop.
4. Lenses, Hoods, & Filters, oh my!
Wait, a filter and hood? Indoors? Yep-o. You can keep them in your bag, and such cheap-and-cheerful toys might be worth a try. It depends of course on what your goals are. If you're looking for a dramatic, large-skeleton shot, a wide angle lens with the right filter may do the job nicely. The hood can help take care of glare from all the glass.
5. Different angles
If you can get above, behind, or below your skeleton, go for it. Even if it's a mastodon skeleton's bum shot.
6. Get the full skeleton
Large skeletons are the main attractions and with any luck, you'll have a few seconds to snap a few images while the view is clear. As best you can, get a full-skeleton shot. The "photo police" are not going to crash in your door if you leave the camera on "Full Auto." Take extra batteries and memory cards if it's going to be a full day. You'll be glad you did.
Have fun out there!