Subglacial Trough Welcome! You are encouraged to register with the site and login (for free). When you register, you support the site and your question history is saved.A team of British researchers, having spent three seasons investigating and mapping a region in West Antarctica, have discovered a massive ancient subglacial trough deeper than the Grand Canyon. A team of British researchers, having spent three seasons investigating and mapping a region in West Antarctica, have A team of British researchers, having investigated and mapped a region in West Antarctica over three seasons, and have A team of British researchers spending three seasons investigating and mapping a region in West Antarctica, and have A team of British researchers has spent three seasons investigating and mapping a region in West Antarctica, A team of British researchers has spent three seasons, in a region in West Antarctica, investigating and mapping, Review Answer