Complex sentence: Available from World Wide Web: The long-term effects of radiation on crews is still largely unknown, however it is theorized that astronauts on a trip to mars will likely receive more than 1000x the radiation dosage of a typical person on earth.
Split into simpler sentences: Available from World Wide Web: The long-term effects of radiation on crews is still largely unknown. However, it is theorized that astronauts on a trip to Mars will likely receive more than 1000x the radiation dosage of a typical person on earth.