While many of Rio de Janeiro’s samba schools have chosen direct attacks on politicians in this year’s carnival, one school has picked a topic whose tensions simmer beneath the surface. Unidos da Vila Isabel’s entry, sponsored by Nissan, saw elaborate tributes to inventors like Albert Einstein, Santos Dumont, Alexander Graham Bell and Thomas Edison sashay the length of the avenue late on Sunday night.
But the samba school’s theme touches on a growing disquiet far from the light-hearted fun that Carnival normally provides. Cuts to government investments in scientific research have left the academic community reeling, while...