a bridal thing at one time. that friday, sandy took the day off from her job at a car dealership to prepare for the party. sandy s husband greg says she was always a mom first. everything was about the kids, you know, so everything revolved around the kids. how excited was she to be a mom? i think she was really excited. i think that s what she wanted. she liked it. sandy had a plan. the kids would spend the day with vicky while she zipped around town. that morning, she left vicky a message on her phone. pick up the birthday cake after 3:00 today, and i ll be down right afterthat. i ll probably see you after 4:00. talk to you later. vicky s hands were full with her kids and sandy s. at first she wasn t too concerned. around 4:30 or 5:00, i started calling her. you re not here yet, sandy. it just wasn t like her, and i
paleobiologist, doctor monica carvalho from the smithsonian tropical research institute, is one of those researchers and joined me to explain the study. we found that after the impact or with the impact, 45% of tropical species disappeared, and it took about 8 million years for diversity to recover. crosstalk. sorry 8 million years is obviously a huge expanse of time, and when it did come back, what was different? forests were very different. so forests that came back resemble a lot rainforests that we know today, they were dominated by flowering plants, they were very dense and they had the same levels of intense ecological interaction that we see today. in the age of dinosaurs, that was not the case. the dominant plants were not flowering plants, it was a mixture of ferns,
disappeared, and it took about 8 million years for diversity to recover. (crosstalk) 8 million years is obviously a huge expanse of time, and when it did come back, what was different? forests were very different. so forests forests were very different. so forests that came back resemble a lot rainforests that we know today, a lot rainforests that we know today, they were dominated by flowering plants, they were very flowering plants, they were very dense and they had the same very dense and they had the same levels of intense ecological interaction that we see today. in the age of dinosaurs, that was not the case dinosaurs, that was not the case the dinosaurs, that was not the case. the dominant plants were not flowering plants, it was a mixture not flowering plants, it was a mixture of ferns, conifers and flowering mixture of ferns, conifers and flowering plants, and it was actually flowering plants, and it was actually a pretty widely open rainforest back then. find
what was different? forests were very different. so forests that came back resemble a lot rainforests that we know today, they were dominated by flowering plants, they were very dense and they had the same levels of intense ecological interaction that we see today. in the age of dinosaurs, that was not the case. the dominant plants were not flowering plants, it was a mixture of ferns, conifers and flowering plants, and it was actually a pretty widely open rainforest back then. and why the difference, why the change do you think when it came back finally after all those millions of years? that is the key question. so. not exactly sure, we think that it could be a mixture of factors, it could be that in the past dinosaurs actually helped keeping the forest open, something very similar to what happened in the african savanna with large elephants knocking down trees,
sorry 8 million years is obviously a huge expanse of time, and when it did come back, what was different? forests were very different. so forests that came back resemble a lot rainforests that we know today, they were dominated by flowering plants, they were very dense and they had the same levels of intense ecological interaction that we see today. in the age of dinosaurs, that was not the case. the dominant plants were not flowering plants, it was a mixture of ferns, conifers and flowering plants, and it was actually a pretty widely open rainforest back then. i see. and why the difference, why the change do you think when it came back finally after all those millions of years? that s the key question. so. we re not exactly sure, we think that it could be