Mystery Theme VII by KlionskyG

Give only the prefix:
What type of "-ologist" might study Dances with Wenches, French 75, or Sand in the Crack?

What are the first and middle initials of the inventor of the footwear originally known as Maine Hunting Shoes?

Astronomical twilight is when the center of the sun is between 12-18 degrees below the horizon.

Nautical twilight is when the center of the sun is between 6-12 degrees below the horizon.

What adjective describes the twilight immediately before sunrise or after sunset, when the center of the sun is between 0-6 degrees below the horizon?

What is the capital of Timor-Leste?

What file extension is used to save data related to digital music editing? Instead of containing the amplitude of an actual or compressed sound recording (like .WAV or .MP3), it instead indicates what notes are played and when, how loud and for how long, which can then be synthesized by a computer. The standard was announced by Robert Moog in 1982.

Either the three- or four-letter extension is acceptable.

What HTML tag is used on

• each
• of
• these
• lines?

"747", "racecar", and "kayak" are well-known modes of transportation that are also palindromes. "A Toyota" is a well-known palindromic car make. What is by far the best-selling palindromic car model in recent years? (Model only, not make.)

Person 1: The actress, whose last name is Tyler, who played Arwen Undómiel in the Lord of the Rings trilogy.

Person 2: A singer-songwriter, a faculty member at Berklee College of Music, and a younger brother of James Taylor.

In addition to having nearly identical last names as each other, Person 1's first name is also Person 2's nickname -- and the first three letters of his first name. What are these three letters?

What is the initialism for a type of relatively safe investment that involves (usually) a fixed term and a fixed expiration date, and therefore typically pays a higher interest rate than a regular savings account? Penalties for withdrawing from this type of investment before maturity are typically significantly higher than for bonds.

What 1997 movie directed by Guillermo del Toro features a species of human-created bugs designed to destroy New York cockroaches? The engineered bugs eventually develop the ability to make themselves look like their human prey before killing the people.

Each red box in this redacted Wikipedia screenshot obscures a different combination of two letters and two numbers. What specific alphanumeric sequence is obscured by both blue boxes?

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What is the theme of this quiz?