Longtime U-M professor Huei Peng has died.

A NASA Earth scientist goes into detail about what kind of projects are being utilized to give us more information about our home planet.

Israel, long suspected of killing Iranian scientists a decade ago amid earlier tensions over Tehran’s nuclear program, has yet to comment on Fakhrizadeh's killing Friday. Iran’s civilian atomic program has continued its experiments and now enriches a growing uranium stockpile up to 4.5% purity in response to the collapse of Iran's nuclear deal after the U.S.' 2018 withdrawal from the accord. Iran long has maintained its nuclear program is peaceful. Iran also could throw out inspectors from the International Atomic Energy Agency, who have provided an unprecedented, real-time look at Iran's nuclear program since the deal. Iranian state television said an old truck with explosives hidden under a load of wood blew up near a sedan carrying Fakhrizadeh.

DUBAI – An Iranian scientist named by the West as the leader of the Islamic Republic's disbanded military nuclear program was killed Friday in an ambush on the outskirts of Tehran, authorities said. Israel, long suspected of killing several Iranian nuclear scientists a decade ago, declined to immediately comment. The agency said, however, that those calculations were “incomplete and fragmented.”IAEA inspectors now monitor Iranian nuclear sites as part of the now-unraveling nuclear deal with world powers. In 2018, Netanyahu gave a presentation in which he unveiled what he described as material stolen by Israel from an Iranian nuclear archive. Remember that name, Fakhrizadeh.”___Associated Press writers Amir Vahdat and Mohammad Nasiri in Tehran, Iran, and Deb Riechmann in Washington contributed to this report.

University of Hong Kong scientists claim to have the first evidence of someone being reinfected with the virus that causes COVID-19. The man had mild symptoms the first time and none the second time; his more recent infection was detected through screening and testing at the Hong Kong airport. It shows that some people do not have lifelong immunity to the virus if they've already had it, To said. If there is a reinfection, it suggests the possibility there was residual immunity ... that helped protect the patient from getting sick again, Goodman said. ___The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institutes Department of Science Education.