At least two other scientists are now beginning different experiments to determine the whales' ages.
(At least two other scientists; are beginning; different experiments; to determine the whales' ages; T:now) Context(At least two other scientists are beginning,List([0, 47))):(At least two other scientists; are beginning different experiments to determine; the whales' ages)
At least two other scientists are beginning,List([0, 47))
At least two other scientists At least two other scientists
are beginning are beginning different experiments to determine
different experiments to determine the whales' ages T:now
the whales' ages