i see, monica carvalho, millions of years for that. i see, monica carvalho, thank you for coming on.nary measure. it follows five reports of cases of blood clots in women who'd been vaccinated, out of a total of 400,000 people who've been given the jab. one of the women died. germany took a similar step on tuesday. meanwhile the uk's medical regulator revealed there have been 30 cases of rare blood clotting in people who've had the oxford—astrazeneca jab and seven people have died. that's out of a total of 18 million administered doses in the uk. our science correspondent rebecca morelle explains more. these clots are unusual in that they're associated with low platelet levels, and platelets are a type of blood cell that normally cause bleeding, not clotting, and these clots can affect the brain, too. so, what needs to be unpicked is whether these are happening naturally or whether they're a really rare reaction to the astrazeneca jab. the incidence is low, so 30 cases out of 18 million jobs. so that's about one event in every 600,000 astrazeneca vaccines. and the uk regulator said t

our thanks to monica carvalho there. protesters took to the streets in the capital algiers, demanding democracy, fair elections and independent judiciary. the country's protest movement was interrupted by the coronavirus pandemic, and these latest demonstrations mark a resumption in the so—called hirak movement. dozens of activists remain behind bars, despite the current president tebboune�*s promises to overhaul the country's institutions. danai howard reports. thousands filled the streets of algiers on friday, chanting long live an algeria that is not military. they're calling for an overhaul of what they say is a corrupt political system and an end to the army's involvement in politics. friday's demonstrations mark the resumption of the weekly street protests that were suspended last year because of the covid—i9 pandemic. their determination has not waned. translation: the algerian people are still thirsty - for freedom, they're still searching for complete independence. translation: the people take to the streets tod

paleo—biologist, dr monica carvalho from the smithsonian tropical research institute is one of those impact or with the impact, 45% of tropical species 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 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 v