Overview

• NASA's OSIRIS-REx spacecraft returned samples from asteroid Bennu two months ago, which have been analyzed to reveal an unusual composition.
• The samples contain high amounts of carbon, water, magnesium, sodium, and phosphorus, a combination that is puzzling scientists.
• The largest sample analyzed so far is a 3.5-centimeter rock, which was found outside the main sample canister.
• Scientists have cataloged over 1,000 Bennu samples, only counting those larger than half a millimeter.
• NASA is currently creating a special screwdriver to access the heart of the sample canister, which is expected to contain more material for analysis.